I have been a repairman since 1973. I taught HVAC for the local apprenticeship program for about 10 years. Dan is a great instructor and a decorated repair technician. Thanks Dan for making our job a lot easier!
I've got tears from laughing,you're going through every bit of nonsense I deal with at work.You just took a migraine of diagnostic nonsense and made it clear and easy.Damn it I hate when I see a hole in wire insulation,almost always green.
Dan, I bought one of your LodaPros and I absolutely love it. I have been a Technician for 38 years and I think what you are doing is great. You taught this old dog a new way of electrical diagnosis and I'm a better diagnostician for it.
Load pro is an awesome product and the Voltmeter only method of diagnostics works. I am a professional Transit Bus Tech with 17 years of experience and electrical and electronic diagnostics is one area I do quite a bit of work in. I'm Master Ase Certified Transit Tech with L2 certification also. I have been using Dan's tool since 2009 and it hasn't failed me. If you use Dan's tool and method you will without a doubt a more competent and efficient electrical tech.
Hey Dan, I've been using the loadpro (in blue point blue) for about two years. Your tool and training videos has saved me countless hours in diag time. I tell everyone I know that runs a multimeter that they should invest in a loadpro and watch your videos. Thanks for your passion and dedication.
Dan, you are a very good teacher. I first saw the Loadpro mentioned a few days ago and couldn't understand what it is. You are a genius to have thought of this method and then created a simple to use tool to encompass the method. Of course the inventor never is rewarded. Stay with your attitude toward the haters. They ain' nothin.
Dan, This video/presentation is almost 8 years old and IS the BEST by far!!!!! I am 54 years old and I have been a Ford Dealership Technician since 1987. I achieved Ford Senior Master status in 1999, with my specialty being in drivability, electrical and vehicle electronics. That all stated, you TOTALLY NAILED every point!!!!! From the beginning, describing just how Service Managers act regarding electrical/electronic diagnostics......to the manual fiasco.......to circuit diag. SPOT ON my friend!! SPOT ON!!!! I literally just ordered a "LOADPro" from Electronic Specialties (Model 180) for use with my Fluke 88. You did a WONDERFUL thing by developing and creating this EXCELLENT tool. Guys make electrical/electronics diagnosis WAY TOO difficult. It is not "magic", it IS knowing how to read and interpret schematics, and knowing the system you are diagnosing. Thank you for your work! Patrick P.S. BTW, I also own the ESI "Low Current Probe" (687) ans the ESI "Relay Buddy Pro" (191). ESI offers a LOT of excellent diag tools! Thank YOU Dan!
Excellent video and understanding of the circuit. Really Electrical problems are simple in nature if one knows electrical and know how to troubleshoot electrical circuit. Otherwise without following rules and understanding it is a big pain. Regards,
Dan, I purchased your book and LOADpro tool several months ago. I wish I had you for an instructor years ago when I was in maintenance school. I learned more from your book and videos than I have anywhere else.Wiring makes so much more sense and is easier to apply the knowledge the way you teach it. I don't dread the electrical problems like I did before. Thank you for all the work.
Hey, you're welcome. Ask questions anytime, and keep at it - 80% of the problems are in wiring, and 90% of the problem finding them is in our heads... Confidence, assertiveness and more confidence.
Dude, Dan......I can not stress how much this and your other videos helped. I have been trying to figure out electrical troubleshooting for some time now. i am understanding more and more through practice on my 92 roadmaster. but dude, I came leaps and bounds watching some of your videos. you speak in the language that I get. you simplify it so the facts are understandable. sheesh! I can't wait to use these leads. f those haters! your the MAN!
It's very lucky that my name - Dan - rhymes with "man". If I am in fact "the man", then I am "Dan the Man". Awesome - but I seriously doubt that I am the actual "man". Thanks though...
After watching this video I realize that I do not ask "What is wrong with it?" when inquiring about a vehicle my apprentice mechanics are working on. I ask "What is is doing or not doing?" They may not know what is wrong with it but may be able to tell you what it is doing or not doing that is abnormal for it. Then I will have a better understanding of what the problem may be and lead them in the right direction if I have experienced that problem in the past. BTW, I have the LOADpro and I would recommend the book (Fundamental Electrical Troubleshooting) with it. The book will show you test and different scenarios in a simple to understand format. Thank You, Dan.
I was going to buy a Power Probe Hook until I accidently came across your TH-cam videos. After watching almost all of your videos over the last three hours I just purchased your LoadPro 181. You have solid teaching videos! I'm looking forward to using your product!
I would just like to take a moment and thank you for making the loadpro, I bought it to find a fault on a 2001 skoda. The ac clutch had system voltage until loaded, loaded it dropped and it was the positive side the problem was on, turned out to be a corroded fuse. Thank god I had the loadpro to help me on the way :)
95tt Well, heck. Glad to know it worked that well. I get that story a lot and it's this kind of message that keeps me going. Just curious -- do you recall the reaction you had when you saw the voltage drop? I mean - you saw 12V, you pushed the button, the voltage dropped, and your reaction was???
hi dan, i bought your book F.E.T and loadpro. i bought your book E.P.G. i have employed your volts only diagnostics method and can honestly tell you your methods and teaching are brilliant. the volts only diagnostic testing is the way forward . so a MASSIVE thank you to you dan. keep up the good work
Hi Daniel, thank you for your invention and LOADpro sits in my diagnosis box all the time. LOADpro saves me time and above all gives me confident peace of mind in my diagnosis works. You got your fan in Korea.
메시지를 보내주셔서 감사합니다. LOADpro를 사용하게 되어 기쁘게 생각합니다. 제가 도와드릴 수 있으면 알려주세요. 참고 - 나의 아버지는 1950년에 한국에서 의무병으로 복무하셨습니다. 나는 1951년 봄에 그가 지프를 타고 산을 내려오는 컬러 사진을 가지고 있습니다.
@bivideo7 With my heart, thank you and your father's sacrifice. I served in the 18th Medcom, 8th US Army in Korea. I trust with active marketing of LOADpro in Korea, more automotive shops will enjoy the LOADpro benefits.
You're a good man, Dan Sullivan. I've seldom seen videos that talk this much sense. My Load Pro has never let me down. I understand the principle, no bull***t - job done. Why complicate things? But you've got the impossible task of convincing the rest of the world. Best wishes from London
Sir I recently stumbled upon you videos and decided to order your tool. Since then you have made me money and I am deeply thankful! Keep up the good work.
Dude you're awesome! I finally understand how circuits work in a vehicle. You really helped out all make sense by keeping it as simple as what it really is. Thanks bro!
I used a loadpro for the first time today to find an open wire on a abs sensor harness. It worked great and allowed me to find the problem fast. I look forward to watching more of these videos and using the tool in place of my meter leads.
Dan thanks, great revision of an old video. Your invention ROCKS. I encourage every new tech to get one and hone their electrical diagnostic skills, because every system on a modern vehicle has some form of electrical circuit associated with it. I'll admit I am old school and know that a good understanding of Ohms Law and how to perform voltage drops on a live circuit are all you need to find your problem. I have done it and know it works when performed correctly. Unfortunately not too many techs use the voltage drop method or know how. I own a test light/voltmeter and it has served me well. Now you tested the positive side of the fan motor with a test light/voltmeter and read source voltage because the circuit was not complete. Plug the fan motor in and test it again and you will see a different result. Ha ha you know that. Next place your test light / voltmeter from the fuse to the fan motor and that would give you the voltage drop indicating a problem. Ha ha you know that too. Now you would have spent a whole lot of time performing voltage drops at various locations on the circuit removing who knows what. Yes you said that as well. Now you did mention that using the test light/voltmeter in an UNLOADED circuit is useless. On that we are in sync. We are also in sync in that your invention simply put is a no brainier. Not much thought, Not much time wasted and No scratching your head thinking did you {mis} something. Ha ha. I am proud to say that I own a LOAD PRO. Now I did say I am old school and break out my test light/voltmeter ( creature of habit ) or Alzheimer's but windup putting it back for the LOAD PRO. Now the true difference between a test light/voltmeter and the LOAD PRO is that an UNINFORMED tech/person can use a LOAD PRO with a higher degree of accuracy and efficiency. Which by the way may have others thinking your competent. I like my test light/voltmeter but it to will pass like the dinosaurs once the LOAD PRO takes off. Again many thanks for your invention and sorry if I ran on and on but I had nothing else to do all my work is done. Damm LOAD PRO:).
Daniel this tool is I been working in cars as a hobby for the past 7 years and the most difficult thing for me is electric, the engineers for sure make it sound very hard. I'm gonna purchase the tool through Amazon. Hope you get the patent work you deserve the credit. Thanks I will be watching more of your videos.
Dan you are spot on about this. I have worked many years for many Electrical contractors and they are all about the same, they want and expect too much out of their workers, ( I have a lot of stories) Great videos, subbed.
I work on refuse trucks for a living, and your are right on the money. The systems are getting more complicated and my Forman is constantly wanting me to put a time to the job. And sometimes it can take a hour sometimes it can take a full day depending on the manufacturers support. I’ve been using a 15 amp light in line with a multimeter and just a mess of different pines and back probes finally started using a load pro and found it to cut my dish time in half. But wish the would off one in different resistance values, I have found that it helps most of the time but sometimes it doesn’t catch the problem all the time depending on the amps of the circuit
Excellent product, excellent book! I've been in the motor trade here in the UK for 20+ years now and this is one of the best things I've ever bought. I can't recommend it enough! (the steadypins are a sanity saver!)
In my case I get these trucks after about 3 or 4 sometimes more than that other techs have already been into the truck for 20+hrs. At that point it's like, well first I have to find out what other issues were created then find the initial problem and fix that too. But I think it's important to have an idea of what you think the problem is before you start so you know where to start at. Example: truck comes in and HVAC blower motor is inop. The manual has you check a lot of other things first but from experience we know to look at the green connector on the frame mounted PDM first because the power pin here burns often. This can save you a lot of time in diag to check these known problem areas first.
I work on everything all brands of cars and this tool is heaven sent that is why i bought it two years ago still works great love this tool makes everything so much simpler . I am going to try this for voltage drop testing with an oscilloscope an thanks for the video .
DAN! you hit the nail right on the head on the company I work for! lol 😂 they guy expects for everything to be fixed in 5 minutes! lol its so freaking unreal nothing takes five minutes in this kind of field lol I own a power prob 3 but every time I need to use it I have to hook to the battery.. I work on big heavy equipment and also your normal dump trucks and stuff This is so awesome I can just get in side with my meter and test stuff with out having to bust out the power prob for some testing .. Man I'm so glad you made this video lol gonna share it with some co workers lol .. definitely gave you a Sub keep up the good work and these dam trucks are getting to be a pain in the ass to work on I wish they would of just kept it simple !!! but nooooo need a 1000 things to make one thing work now uhhhh. 🤦🏽♂️ lol I'm a diesel mechanic but I've been the fall guy to do electrical because no else has the patience for it lol .. I have some experience but like you said if the company doesn't invest in the information it makes my job harder so I really have to get the wheels turning in my head lol but thank god for cell phones with internet lol once I under stand how the system works I can find the problem quite .. but like you said everything is changing so fast its just getting to be ridiculous lol .. I'm defiantly going to order your tool !! looking forward to using it!
hello Dan ! I just bought the loadpro 180 it feels very well made & i'm looking forward to use it soon & hope you can renew your patent !! & i enjoyed you videos! thank you!!
As an industrial electical and electronic technician the theory behind your tool is sound and with the changes in tecnology it should be in every technicians tool box. There will always be pros and cons. For the cons they lack electrical theary and knowledge. Good video
I've never heard of this product before but I've been using a power resistor in a jumper to perform the same diag procedure and except for intermittent faults the procedure works 100%
You're the fucking man Daniel. I work at Penske truck Leasing and rental in CA and our trainers swear by your tool and wanted us to start using it. I just begin using it a few months ago and ohmygosh. Best tool I have ever used. I begin teaching it to another tech at the shop. Thanks man
I am at the point in the FET manual where the Loadpro instructions are. I haven't used the leads yet but I have learned a lot from the book. Thanks Daniel!
This month's issue of Professional Tool & Equipment News has a positive endorsement of Load Pro in the Top 10 Tools article . I have two sets and love them .
Hi Dan. I've really enjoyed your tutorial videos and have found them to be very educational. I do have a question about using the Load Pro on pcm circuits. The instructions say not to use them on the computer inputs. How would I diagnose a 5v reference circuit with the load pro tool? Or the sensor circuits between the pcm and the sensors? It would be greatly appreciated if you could demonstrate this. I can't find anything on the internet on this.
I’ve finally found a teacher that understands the subject! Thanks so much for the help. I found it at Amazon and need to know if you have a newer model coming or is the 181 the one to get
Hey Daniel. Thank you for your commitment to teach electrical circuit diagnoses and inventing a tool to make it easier. I own the tool and love it. I do have a question. Once you find out where you problem lies, weather it is an open, short or high resistance, is there a video on a teaching on what to do next on how to find where the problem is at? Lets say for example in your video you put a 1 ohm resistance in the circuit, how would you go about finding where the resistance lies in the wiring? Is there a simple step by step process to follow? Thx in advance for the feed back.
Move the black lead to ground - isolate the positive - repeat the test. If it comes back it's in the (+) - if it goes away it's in the (-). Then you work back towards either the fuse or ground. Same as a TEST light (that's why the first tool was called TESlite...)
just order my load pro.. been a power probe user for years(still keeping it) ..I work for the US BORDER PATROL and we have all the police equipment plus lots of special lighting equipment.cant wait to use it.
Just wondering how this tester would work for circuits that are monitored by the PCM and usually have a 5 volt signal etc. I am looking at an ambient air sensor code now and this got me to wondering if this tool would allow me to test the integrity of the wires running back to the PCM. It is running a P0073 code, which may be a break or high resistance in the wire somewheres.
just wanted to say I bought a load pro from our snapon dealer around 90 bucks Canadian iam still learning nobody else in the shop I work at doesn't really care to they still use the old head light trick it works I guess but I feel a little more professional when I walk out to the bus when the driver has a complaint thanks dan I also enjoy your videos
Hi dan I have one question about using loadpro leads..when you do the voltage drop pressing the button on the loadpro lead ..will it make any damage to the circuit or lead when you press the button for long time? Thanks
I ordered and used the load pro recently. I wish I known about this sooner. I have one question. How do you use it with lower voltage like 8 or 5 volt reference circuits.
Hi Daniel Sullivan looks like an awesome product. I currently use a 12v healight bulb with test leads to load test a circuit but i know this can be dangerous for computer circuits as the internal resistor might blow. Is your load pro safe for loading computer circuits?
At 12min in this video you say source voltage present at the load connector means you can not have a short to ground or an open/broken wire. You are correct about the short to ground but the wire still could be broken. Example: one of the 2 wires has rubbed through and all the conductors are broken but they are touching. With a volt meter only you will see full battery voltage but it won't support a load. That's why it's important to load test your wires because with a meter only check you can miss this one.
Ok I should of listened a bit further. I have been bitten by that exact scenario. And I think that's probably why you invented the load pro. Before I owned a load pro I used a parallel bank of 4 halogen bulbs with a 100a POT to load test with.
Dan , I was looking at the review on amazon and I see where someone comented that the batteries died in his load pro . He said there sealed inside it and there is no way to replace the batteries ....... you need to buy a new unit . Is it true their sealed inside it with no way to replace the batteries ??????? maybe I,m missing something here being I have not seen any other complaints about batteries failing. Honestly I avoid rechargable tools that you cant replace the rechargable batteries built in it. Guess thats just me.
Dude I have given similar answers to stupidvisors over the years. How long till you fix it? That depends on how long it takes me to troubleshoot the issue. Well how long till you finish troubleshooting? Now how the hell am I supposed to give you a real answer to that? Well I need to know because I have another problem for you to troubleshoot. You do? Yes I do, and its a priority. Ok. So..... how long till you figure out what's wrong with it? How about if you go outside and play hide and go ___ yourself and I will come get you when I get it figured out... Goodbye!!! Hint hint hint... As you can image, I have been fired several times over the years... lol
Have question regarding voltage drop. scenario 1. Objective=To check the integrity of ground wires from the PCM. -KOEOff ( reading 5 volts on ref) - circuit is on ( supposedly loaded) -hook up one lead to BAT- and the other lead to entry point at PCM connector ( connector is attached to PCM). DMM reads 6.2mV. Would such procedure establish if the circuit is good ( mainly to see if wire going into PCM is connected to ground and in good condition) Can the LoadPro also perform this test, if so what are the conditions and hook up. Someone suggested to disconnect PCM wire, use a test light. One side goes to BAT+ the other touch the ground PCM wire, if light is "bright" circuit OK. I ask that you comment on the merits or lack thereof of each method, if possible Thank you
I totally agree when someone asks me what's wrong my answer is it doesn't work and how long we'll to fix or figure out what's wrong because one of those things I can't answer.
Hi Dan. Thanks for all your videos. They are really helpful. For some reason, I'm having difficulty understanding the theory behind why the load Pro works. Do you have a video explaining, in greater detail, the electrical theory behind it. I have a pretty solid understanding of basic electricity, but for some reason this one tool's application is escaping me. My understanding is that you are supposed to get a voltage drop between the power and ground sides of the connector if the circuit is working properly and its loaded. Also, how does the load pro allow you to test circuits for multiple different loads that will all have different resistances if the load Pro only applies one constant resistance? Please forgive my ignorance but help me if you can. Thanks a lot
jawojnicki First, all circuits only have one load. You may not find it easy to agree, but it's true - and that's why the tool works. (It would work otherwise, but it would be less simple). If there's only one load - it *should* drop 100% of applied voltage. The LOADpro is a substitute load. If any other resistances (faults) are in the circuit with the real load removed, then the LOADpro *cannot* drop/use 100%. The additional resistances (faults) will use voltage, making it impossible for the LOADpro to drop 100% (±12.6V). If you know what a voltage drop is (energy a device consumes when current flows) then you should appreciate that the drop can't occur if you remove the load - the circuit is "open". The LOADpro completes the circuit. Instead of an *open-circuit* voltage (2/3 useless) you read a *voltage drop* across the tool. Simple. BTW - a lot of people have posted articles/forums on how to build the tool. A little cheezy and scumbag, but what can you do? If you're sincere, I hope this helps. If you want to build your own, I can't stop you - but I'm filing a lawsuit against Snap-on Friday for patent infringement. It's one thing for a major company to rip me off, but a far different one for a fellow mechanic/student to do it. Either way - if this helps you or someone else I'm happy to share it.
I wish I could see where all your leads are coming/going so I can understand how the testing is completed. Just a suggestion next time you do a video. I am just a normal DIYer who want to learn.
I sometimes take short cuts in trouble shooting electrical problems, I first look at the symptoms of what the system is doing or not doing and use my experience to try and go straight to the problem, (sometimes it works sometimes not).
i wanted to add that my limited understanding of diag also led me to question why your patent wasn't part of the original design of the dvom it makes so much sense especially for voltage drop...I've never done one without the engine running (loading) the starter but sure wish I could in cases where no load was available
So I love the load pro , and even got some other people in my shop to use it. But I do have a question, is there any alligator clips that screw on to these since the ones I find don’t match the threads, and same thing with banana screw on adapters I find the same issue with.
one guy I worked with at super cash autmotive ten years ago had one he made homemade we had a lot of bad wiring that went to 10 shops ..old Mikey load tested the circuit fixed in a hour , then I had to change the whole wiring harnest lol I remember the rig he had it Was a battery and few things and homemade just this this he was a 50 year veteran r.i.p mikie Gibliano wish he could be here to see this
If only electronic troubleshooting was simply confirming wiring integrity of a DC circuit life would be a breeze. Confirming the integrity of the wiring in a circuit is only one aspect of a potential automotive electronic problem (a minor one at that), which by the way can be better determined by a simple test light that contains the appropriate load. The real problem is understanding the circuit's and the devices connected to that circuit theory of operation and understanding what you should be seeing for that device's input signal and the resultant output signal. So, a Load Pro might come in handy handling an DC electrical problem, but not one that is electronic. And the reality is that most hard to solve automotive problems are electronic not electrical.
if you backprobe the fan when its plugged and on it will show the voltage drop.......you need to do more vids on hands on like this and speak to the gas mechanic (we are more with more complex vehicles) i own the load pro and the book and to be honest friends ask me whats that and until now i didnt know how to use it especially on the 5 volts...now i know more.....NEVER EVER GIVE UP its a nice idea...ill be your salesman just do more vids like this
Do you need to check for source voltage when the Connector is connected or disconnected (back probing) to know if I’ve eliminated 2/3 of the possible causes?
What if the circuit is ground controlled by the ECM? Like an Injector. How will you check the circuit for all three faults if the ground is not present at all times?
+Armando Segura The only way to properly do that (especially since injectors use PWM) is to disconnect the harness from the controller and supply power and ground then load test the circuit.
Dan will this find a wire with broken strands where not all strands are broken? Obviously you my see volts but lack the flow because strands are broken.
![Voltage Drop Testing With A Test Light? [Part 2]](http://i.ytimg.com/vi/tRUDnaJMnPQ/mqdefault.jpg)
I have been a repairman since 1973. I taught HVAC for the local apprenticeship program for about 10 years. Dan is a great instructor and a decorated repair technician. Thanks Dan for making our job a lot easier!
I've got tears from laughing,you're going through every bit of nonsense I deal with at work.You just took a migraine of diagnostic nonsense and made it clear and easy.Damn it I hate when I see a hole in wire insulation,almost always green.
Dan, I bought one of your LodaPros and I absolutely love it. I have been a Technician for 38 years and I think what you are doing is great. You taught this old dog a new way of electrical diagnosis and I'm a better diagnostician for it.
You're welcome.
I like that word......”diagnostician”💯
Load pro is an awesome product and the Voltmeter only method of diagnostics works. I am a professional Transit Bus Tech with 17 years of experience and electrical and electronic diagnostics is one area I do quite a bit of work in. I'm Master Ase Certified Transit Tech with L2 certification also. I have been using Dan's tool since 2009 and it hasn't failed me. If you use Dan's tool and method you will without a doubt a more competent and efficient electrical tech.
Hey Dan, I've been using the loadpro (in blue point blue) for about two years. Your tool and training videos has saved me countless hours in diag time. I tell everyone I know that runs a multimeter that they should invest in a loadpro and watch your videos. Thanks for your passion and dedication.
Where can you buy it? Please add a link so we can purchase Dan.
Dan, thanks to your invention and your books and training, diagnosing electrical faults is just as easy as fixing a flat tire!
Dan, you are a very good teacher. I first saw the Loadpro mentioned a few days ago and couldn't understand what it is. You are a genius to have thought of this method and then created a simple to use tool to encompass the method. Of course the inventor never is rewarded. Stay with your attitude toward the haters. They ain' nothin.
Dan,
This video/presentation is almost 8 years old and IS the BEST by far!!!!!
I am 54 years old and I have been a Ford Dealership Technician since 1987. I achieved Ford Senior Master status in 1999, with my specialty being in drivability, electrical and vehicle electronics.
That all stated, you TOTALLY NAILED every point!!!!! From the beginning, describing just how Service Managers act regarding electrical/electronic diagnostics......to the manual fiasco.......to circuit diag. SPOT ON my friend!! SPOT ON!!!!
I literally just ordered a "LOADPro" from Electronic Specialties (Model 180) for use with my Fluke 88. You did a WONDERFUL thing by developing and creating this EXCELLENT tool.
Guys make electrical/electronics diagnosis WAY TOO difficult. It is not "magic", it IS knowing how to read and interpret schematics, and knowing the system you are diagnosing.
Thank you for your work!
Patrick
P.S. BTW, I also own the ESI "Low Current Probe" (687) ans the ESI "Relay Buddy Pro" (191).
ESI offers a LOT of excellent diag tools! Thank YOU Dan!
Keep up the good work Sir!
I found these 6 years old videos and they are Gold. Thank you for loading these videos.
Excellent video and understanding of the circuit. Really Electrical problems are simple in nature if one knows electrical and know how to troubleshoot electrical circuit. Otherwise without following rules and understanding it is a big pain. Regards,
Dan, I purchased your book and LOADpro tool several months ago. I wish I had you for an instructor years ago when I was in maintenance school. I learned more from your book and videos than I have anywhere else.Wiring makes so much more sense and is easier to apply the knowledge the way you teach it. I don't dread the electrical problems like I did before.
Thank you for all the work.
Hey, you're welcome. Ask questions anytime, and keep at it - 80% of the problems are in wiring, and 90% of the problem finding them is in our heads... Confidence, assertiveness and more confidence.
Dude, Dan......I can not stress how much this and your other videos helped. I have been trying to figure out electrical troubleshooting for some time now. i am understanding more and more through practice on my 92 roadmaster. but dude, I came leaps and bounds watching some of your videos. you speak in the language that I get. you simplify it so the facts are understandable. sheesh! I can't wait to use these leads. f those haters! your the MAN!
It's very lucky that my name - Dan - rhymes with "man". If I am in fact "the man", then I am "Dan the Man". Awesome - but I seriously doubt that I am the actual "man". Thanks though...
Dan the "man" it is then !
tae kim Yes. There is no battery...
After watching this video I realize that I do not ask "What is wrong with it?" when inquiring about a vehicle my apprentice mechanics are working on. I ask "What is is doing or not doing?" They may not know what is wrong with it but may be able to tell you what it is doing or not doing that is abnormal for it. Then I will have a better understanding of what the problem may be and lead them in the right direction if I have experienced that problem in the past. BTW, I have the LOADpro and I would recommend the book (Fundamental Electrical Troubleshooting) with it. The book will show you test and different scenarios in a simple to understand format. Thank You, Dan.
I was going to buy a Power Probe Hook until I accidently came across your TH-cam videos. After watching almost all of your videos over the last three hours I just purchased your LoadPro 181. You have solid teaching videos! I'm looking forward to using your product!
I would just like to take a moment and thank you for making the loadpro, I bought it to find a fault on a 2001 skoda. The ac clutch had system voltage until loaded, loaded it dropped and it was the positive side the problem was on, turned out to be a corroded fuse. Thank god I had the loadpro to help me on the way :)
95tt Well, heck. Glad to know it worked that well. I get that story a lot and it's this kind of message that keeps me going. Just curious -- do you recall the reaction you had when you saw the voltage drop? I mean - you saw 12V, you pushed the button, the voltage dropped, and your reaction was???
hi dan, i bought your book F.E.T and loadpro. i bought your book E.P.G. i have employed your volts only diagnostics method and can honestly tell you your methods and teaching are brilliant. the volts only diagnostic testing is the way forward . so a MASSIVE thank you to you dan. keep up the good work
Hi Daniel, thank you for your invention and LOADpro sits in my diagnosis box all the time. LOADpro saves me time and above all gives me confident peace of mind in my diagnosis works. You got your fan in Korea.
메시지를 보내주셔서 감사합니다. LOADpro를 사용하게 되어 기쁘게 생각합니다. 제가 도와드릴 수 있으면 알려주세요. 참고 - 나의 아버지는 1950년에 한국에서 의무병으로 복무하셨습니다. 나는 1951년 봄에 그가 지프를 타고 산을 내려오는 컬러 사진을 가지고 있습니다.
@bivideo7 With my heart, thank you and your father's sacrifice. I served in the 18th Medcom, 8th US Army in Korea. I trust with active marketing of LOADpro in Korea, more automotive shops will enjoy the LOADpro benefits.
You're a good man, Dan Sullivan. I've seldom seen videos that talk this much sense. My Load Pro has never let me down. I understand the principle, no bull***t - job done.
Why complicate things? But you've got the impossible task of convincing the rest of the world.
Best wishes from London
Sir I recently stumbled upon you videos and decided to order your tool. Since then you have made me money and I am deeply thankful! Keep up the good work.
Dude you're awesome! I finally understand how circuits work in a vehicle. You really helped out all make sense by keeping it as simple as what it really is. Thanks bro!
You're welcome - now teach!
I used a loadpro for the first time today to find an open wire on a abs sensor harness. It worked great and allowed me to find the problem fast. I look forward to watching more of these videos and using the tool in place of my meter leads.
Dan thanks, great revision of an old video. Your invention ROCKS. I encourage every new tech to get one and hone their electrical diagnostic skills, because every system on a modern vehicle has some form of electrical circuit associated with it. I'll admit I am old school and know that a good understanding of Ohms Law and how to perform voltage drops on a live circuit are all you need to find your problem. I have done it and know it works when performed correctly. Unfortunately not too many techs use the voltage drop method or know how. I own a test light/voltmeter and it has served me well. Now you tested the positive side of the fan motor with a test light/voltmeter and read source voltage because the circuit was not complete. Plug the fan motor in and test it again and you will see a different result. Ha ha you know that. Next place your test light / voltmeter from the fuse to the fan motor and that would give you the voltage drop indicating a problem. Ha ha you know that too. Now you would have spent a whole lot of time performing voltage drops at various locations on the circuit removing who knows what. Yes you said that as well. Now you did mention that using the test light/voltmeter in an UNLOADED circuit is useless. On that we are in sync. We are also in sync in that your invention simply put is a no brainier. Not much thought, Not much time wasted and No scratching your head thinking did you {mis} something. Ha ha. I am proud to say that I own a LOAD PRO. Now I did say I am old school and break out my test light/voltmeter ( creature of habit ) or Alzheimer's but windup putting it back for the LOAD PRO. Now the true difference between a test light/voltmeter and the LOAD PRO is that an UNINFORMED tech/person can use a LOAD PRO with a higher degree of accuracy and efficiency. Which by the way may have others thinking your competent. I like my test light/voltmeter but it to will pass like the dinosaurs once the LOAD PRO takes off.
Again many thanks for your invention and sorry if I ran on and on but I had nothing else to do all my work is done. Damm LOAD PRO:).
Daniel this tool is I been working in cars as a hobby for the past 7 years and the most difficult thing for me is electric, the engineers for sure make it sound very hard. I'm gonna purchase the tool through Amazon. Hope you get the patent work you deserve the credit. Thanks I will be watching more of your videos.
Dan you are spot on about this. I have worked many years for many Electrical contractors and they are all about the same, they want and expect too much out of their workers, ( I have a lot of stories) Great videos, subbed.
I work on refuse trucks for a living, and your are right on the money. The systems are getting more complicated and my Forman is constantly wanting me to put a time to the job. And sometimes it can take a hour sometimes it can take a full day depending on the manufacturers support. I’ve been using a 15 amp light in line with a multimeter and just a mess of different pines and back probes finally started using a load pro and found it to cut my dish time in half. But wish the would off one in different resistance values, I have found that it helps most of the time but sometimes it doesn’t catch the problem all the time depending on the amps of the circuit
Excellent product, excellent book! I've been in the motor trade here in the UK for 20+ years now and this is one of the best things I've ever bought. I can't recommend it enough!
(the steadypins are a sanity saver!)
What's right..is correct! Your understanding,experience and method is the best on youtube!
Great explanations here Mr. Sullivan. I wish I had seen this like forty years ago.You are an excellent teacher sir.
You r very smart and knowledgeable probably scares others very clear way to explain it
Best tool and best video ever thank you. I can’t even tell you how much time this tool has takin off jobs of mine. your tool has saved me thank you
There’s quite a bit of psychology amongst this. Love it! Thanks 😊
Dan ur awesome. I’m 9 years late finding u on here but I love your product and ur philosophies. Thanks man
In my case I get these trucks after about 3 or 4 sometimes more than that other techs have already been into the truck for 20+hrs. At that point it's like, well first I have to find out what other issues were created then find the initial problem and fix that too. But I think it's important to have an idea of what you think the problem is before you start so you know where to start at. Example: truck comes in and HVAC blower motor is inop. The manual has you check a lot of other things first but from experience we know to look at the green connector on the frame mounted PDM first because the power pin here burns often. This can save you a lot of time in diag to check these known problem areas first.
Just discovered your videos. You think like I do. I think I'll be ordering your tool. Thanks.
People complicate electrical problems all the time.
I work on everything all brands of cars and this tool is heaven sent that is why i bought it two years ago still works great love this tool makes everything so much simpler . I am going to try this for voltage drop testing with an oscilloscope an thanks for the video .
Did it work with an o scope and do you use it on your scope regularly?
DAN! you hit the nail right on the head on the company I work for! lol 😂 they guy expects for everything to be fixed in 5 minutes! lol its so freaking unreal nothing takes five minutes in this kind of field lol I own a power prob 3 but every time I need to use it I have to hook to the battery.. I work on big heavy equipment and also your normal dump trucks and stuff This is so awesome I can just get in side with my meter and test stuff with out having to bust out the power prob for some testing .. Man I'm so glad you made this video lol gonna share it with some co workers lol .. definitely gave you a Sub keep up the good work and these dam trucks are getting to be a pain in the ass to work on I wish they would of just kept it simple !!! but nooooo need a 1000 things to make one thing work now uhhhh. 🤦🏽♂️ lol I'm a diesel mechanic but I've been the fall guy to do electrical because no else has the patience for it lol .. I have some experience but like you said if the company doesn't invest in the information it makes my job harder so I really have to get the wheels turning in my head lol but thank god for cell phones with internet lol once I under stand how the system works I can find the problem quite .. but like you said everything is changing so fast its just getting to be ridiculous lol .. I'm defiantly going to order your tool !! looking forward to using it!
hello Dan ! I just bought the loadpro 180 it feels very well made & i'm looking forward to use it soon & hope you can renew your patent !! & i enjoyed you videos! thank you!!
As an industrial electical and electronic technician the theory behind your tool is sound and with the changes in tecnology it should be in every technicians tool box. There will always be pros and cons. For the cons they lack electrical theary and knowledge. Good video
Outstanding, I plan on purchasing this tomorrow, I totally agree Dan awesome job! And I have learned lots!
I've never heard of this product before but I've been using a power resistor in a jumper to perform the same diag procedure and except for intermittent faults the procedure works 100%
You're the fucking man Daniel. I work at Penske truck Leasing and rental in CA and our trainers swear by your tool and wanted us to start using it. I just begin using it a few months ago and ohmygosh. Best tool I have ever used. I begin teaching it to another tech at the shop. Thanks man
Dan, i teach at a tech College and love the Load Pro.
Great tool. Keep up the good work!
I am at the point in the FET manual where the Loadpro instructions are. I haven't used the leads yet but I have learned a lot from the book. Thanks Daniel!
finally someone with the brains and the balls explains the truth, anyone that doesn't agree doesn't FULLY understand electrical REPAIR.
This month's issue of Professional Tool & Equipment News has a positive endorsement of Load Pro in the Top 10 Tools article . I have two sets and love them .
Hi Dan. I've really enjoyed your tutorial videos and have found them to be very educational. I do have a question about using the Load Pro on pcm circuits. The instructions say not to use them on the computer inputs. How would I diagnose a 5v reference circuit with the load pro tool? Or the sensor circuits between the pcm and the sensors? It would be greatly appreciated if you could demonstrate this. I can't find anything on the internet on this.
Did you figure it out?
I’ve finally found a teacher that understands the subject! Thanks so much for the help. I found it at Amazon and need to know if you have a newer model coming or is the 181 the one to get
Does the load pro eliminate risk of damaging on board computer systems? Thank you for all you do and helping us understand electrical.
I trust the Voltmeter with the LOADpro it never Fail.
Daniel its an excellent tool , it costed me more than 100 $ , mainly shipping and tax but I think money well spent.
Still love watching all your videos
Excellent teacher and product
I agrre with you on load testing a circuit.
It saves a bunch of time
Hey Daniel. Thank you for your commitment to teach electrical circuit diagnoses and inventing a tool to make it easier. I own the tool and love it. I do have a question. Once you find out where you problem lies, weather it is an open, short or high resistance, is there a video on a teaching on what to do next on how to find where the problem is at? Lets say for example in your video you put a 1 ohm resistance in the circuit, how would you go about finding where the resistance lies in the wiring? Is there a simple step by step process to follow? Thx in advance for the feed back.
Move the black lead to ground - isolate the positive - repeat the test. If it comes back it's in the (+) - if it goes away it's in the (-). Then you work back towards either the fuse or ground. Same as a TEST light (that's why the first tool was called TESlite...)
i just love watching you.....you're one of my go to guys. Eric the car guy is the other one
Eric hates me... won't help. Thinks my way is wrong...
just order my load pro.. been a power probe user for years(still keeping it) ..I work for the US BORDER PATROL and we have all the police equipment plus lots of special lighting equipment.cant wait to use it.
Just wondering how this tester would work for circuits that are monitored by the PCM and usually have a 5 volt signal etc. I am looking at an ambient air sensor code now and this got me to wondering if this tool would allow me to test the integrity of the wires running back to the PCM. It is running a P0073 code, which may be a break or high resistance in the wire somewheres.
At about 13 min crucial. Great job explaining TY
just wanted to say I bought a load pro from our snapon dealer around 90 bucks Canadian iam still learning nobody else in the shop I work at doesn't really care to they still use the old head light trick it works I guess but I feel a little more professional when I walk out to the bus when the driver has a complaint thanks dan I also enjoy your videos
all your statements are %100 accurate I still have the yellow original teslite.Keep up the great work
An excellent video, to the point and direct
Dan Sullivan is the man. The guy knows his shit and can teach it extremely well.
Hi dan I have one question about using loadpro leads..when you do the voltage drop pressing the button on the loadpro lead ..will it make any damage to the circuit or lead when you press the button for long time? Thanks
I ordered and used the load pro recently. I wish I known about this sooner. I have one question. How do you use it with lower voltage like 8 or 5 volt reference circuits.
Hi Daniel Sullivan looks like an awesome product. I currently use a 12v healight bulb with test leads to load test a circuit but i know this can be dangerous for computer circuits as the internal resistor might blow. Is your load pro safe for loading computer circuits?
5V, 8V, 12V and 24V. No problem...
At 12min in this video you say source voltage present at the load connector means you can not have a short to ground or an open/broken wire. You are correct about the short to ground but the wire still could be broken. Example: one of the 2 wires has rubbed through and all the conductors are broken but they are touching. With a volt meter only you will see full battery voltage but it won't support a load. That's why it's important to load test your wires because with a meter only check you can miss this one.
Ok I should of listened a bit further. I have been bitten by that exact scenario. And I think that's probably why you invented the load pro. Before I owned a load pro I used a parallel bank of 4 halogen bulbs with a 100a POT to load test with.
So what if let's say it's the ground wire that has the high resistance how would you determine the issue would you just switch polarity?
Dan , I was looking at the review on amazon and I see where someone comented that the batteries died in his load pro . He said there sealed inside it and there is no way to replace the batteries ....... you need to buy a new unit . Is it true their sealed inside it with no way to replace the batteries ??????? maybe I,m missing something here being I have not seen any other complaints about batteries failing. Honestly I avoid rechargable tools that you cant replace the rechargable batteries built in it. Guess thats just me.
+dcbigsky There is no battery.
I’m with Ya Dan… I understand your view
Dude I have given similar answers to stupidvisors over the years.
How long till you fix it?
That depends on how long it takes me to troubleshoot the issue.
Well how long till you finish troubleshooting?
Now how the hell am I supposed to give you a real answer to that?
Well I need to know because I have another problem for you to troubleshoot.
You do?
Yes I do, and its a priority.
Ok.
So..... how long till you figure out what's wrong with it?
How about if you go outside and play hide and go ___ yourself and I will come get you when I get it figured out... Goodbye!!! Hint hint hint...
As you can image, I have been fired several times over the years... lol
Mind blown. Its so simple
That's a great video, I learned a lot from it.
Have question regarding voltage drop.
scenario 1.
Objective=To check the integrity of ground wires from the PCM.
-KOEOff ( reading 5 volts on ref) - circuit is on ( supposedly loaded)
-hook up one lead to BAT- and the other lead to entry point at PCM connector ( connector is attached to PCM).
DMM reads 6.2mV.
Would such procedure establish if the circuit is good ( mainly to see if wire going into PCM is connected to ground and in good condition)
Can the LoadPro also perform this test, if so what are the conditions and hook up.
Someone suggested to disconnect PCM wire, use a test light. One side goes to BAT+ the other touch the ground PCM wire, if light is "bright" circuit OK.
I ask that you comment on the merits or lack thereof of each method, if possible
Thank you
I totally agree when someone asks me what's wrong my answer is it doesn't work and how long we'll to fix or figure out what's wrong because one of those things I can't answer.
question on battery and starter voltage ,, If voltage on battery is 12 volts and the voltage on starter is the same.. why would you replace starter?
Curious about using this to load test through computer controlled grounds like to starter relays. .5Amps seems a little high
Hi Dan. Thanks for all your videos. They are really helpful. For some reason, I'm having difficulty understanding the theory behind why the load Pro works. Do you have a video explaining, in greater detail, the electrical theory behind it. I have a pretty solid understanding of basic electricity, but for some reason this one tool's application is escaping me. My understanding is that you are supposed to get a voltage drop between the power and ground sides of the connector if the circuit is working properly and its loaded. Also, how does the load pro allow you to test circuits for multiple different loads that will all have different resistances if the load Pro only applies one constant resistance? Please forgive my ignorance but help me if you can. Thanks a lot
jawojnicki First, all circuits only have one load. You may not find it easy to agree, but it's true - and that's why the tool works. (It would work otherwise, but it would be less simple). If there's only one load - it *should* drop 100% of applied voltage. The LOADpro is a substitute load. If any other resistances (faults) are in the circuit with the real load removed, then the LOADpro *cannot* drop/use 100%. The additional resistances (faults) will use voltage, making it impossible for the LOADpro to drop 100% (±12.6V). If you know what a voltage drop is (energy a device consumes when current flows) then you should appreciate that the drop can't occur if you remove the load - the circuit is "open". The LOADpro completes the circuit. Instead of an *open-circuit* voltage (2/3 useless) you read a *voltage drop* across the tool. Simple. BTW - a lot of people have posted articles/forums on how to build the tool. A little cheezy and scumbag, but what can you do? If you're sincere, I hope this helps. If you want to build your own, I can't stop you - but I'm filing a lawsuit against Snap-on Friday for patent infringement. It's one thing for a major company to rip me off, but a far different one for a fellow mechanic/student to do it. Either way - if this helps you or someone else I'm happy to share it.
I wish I could see where all your leads are coming/going so I can understand how the testing is completed. Just a suggestion next time you do a video. I am just a normal DIYer who want to learn.
There are more videos.
I sometimes take short cuts in trouble shooting electrical problems, I first look at the symptoms of what the system is doing or not doing and use my experience to try and go straight to the problem, (sometimes it works sometimes not).
Can i check injector driver signal or coil driver signal ?
Thank you for what you do and hope to learn a lot
thank you mr. dan sullivan very good video...learn a lot about electrical troubleshoot
how much is those load pro cost? thanks...
Kevin Tan
Kevin Tan Only about $50-$60 online.
Hey Dan, Can the load pro cause damage by overloading a circuit that is pcm/ecu controlled?
+cortney jeffrey Nope. Not a worry.
Is it safe to put a load on a 5v reference circuit?
i wanted to add that my limited understanding of diag also led me to question why your patent wasn't part of the original design of the dvom it makes so much sense especially for voltage drop...I've never done one without the engine running (loading) the starter but sure wish I could in cases where no load was available
You are a master!!! Excelent video!!!
So I love the load pro , and even got some other people in my shop to use it. But I do have a question, is there any alligator clips that screw on to these since the ones I find don’t match the threads, and same thing with banana screw on adapters I find the same issue with.
Amazon
one guy I worked with at super cash autmotive ten years ago had one he made homemade we had a lot of bad wiring that went to 10 shops ..old Mikey load tested the circuit fixed in a hour , then I had to change the whole wiring harnest lol I remember the rig he had it Was a battery and few things and homemade just this this he was a 50 year veteran r.i.p mikie Gibliano wish he could be here to see this
If only electronic troubleshooting was simply confirming wiring integrity of a DC circuit life would be a breeze. Confirming the integrity of the wiring in a circuit is only one aspect of a potential automotive electronic problem (a minor one at that), which by the way can be better determined by a simple test light that contains the appropriate load. The real problem is understanding the circuit's and the devices connected to that circuit theory of operation and understanding what you should be seeing for that device's input signal and the resultant output signal. So, a Load Pro might come in handy handling an DC electrical problem, but not one that is electronic. And the reality is that most hard to solve automotive problems are electronic not electrical.
if you backprobe the fan when its plugged and on it will show the voltage drop.......you need to do more vids on hands on like this and speak to the gas mechanic (we are more with more complex vehicles) i own the load pro and the book and to be honest friends ask me whats that and until now i didnt know how to use it especially on the 5 volts...now i know more.....NEVER EVER GIVE UP its a nice idea...ill be your salesman just do more vids like this
Do you need to check for source voltage when the Connector is connected or disconnected (back probing) to know if I’ve eliminated 2/3 of the possible causes?
i belive is umplug for example checking a ac compresser if is power at the connecter then the problem is in the compresser
I have to say this tool works great today it found a burnt pin in a connector when it zeroed out when I pressed the button at the connector
What if the circuit is ground controlled by the ECM? Like an Injector. How will you check the circuit for all three faults if the ground is not present at all times?
jumper to ground? (thinking out loud)
+Armando Segura The only way to properly do that (especially since injectors use PWM) is to disconnect the harness from the controller and supply power and ground then load test the circuit.
Also could you explain the difference between doing a voltage drop CORRECTLY and how the load pro works?
Dan will this find a wire with broken strands where not all strands are broken? Obviously you my see volts but lack the flow because strands are broken.
Dan old customer can you still supply parts for teslite leads
Can this be used on 24 Volt trucks?
What is the difference between the function of this tool and the "Hotshot" function on the Power Probe Hook?
sr will it work on heater O2 's
and 5v referance voltaje
only problem i had with the LOADpro leads are doing a voltage(amp/ma) test on fuses the leads are to wide to fit on the outside of the fuses