Im 21, I have 5 ASE's and work in a independent repair shop. I watch your videos in my free time trying to learn all i can. You really have helped me in the real world diagnosing problems and understanding systems. thanks for the videos you make!! it has made me a better technician!
Thanx Eric TheCarGuy and Aaron Houk (couple comments below) Fixed the ole ladies car in less than 4 hours. That includes watching this and a few different vids, WALKING to the Hardware store, grabbing a Gerry can of fuel, changing the batteries in my flash light, a quick jaunt to the beer store, a conference with the neighbourhood guys (who saw a hood up and were drawn like flies to shit.... they didn't help, but drank my beer), and lastly actually doing the repairs. I'm a hero for less than an hour actual work. Keep up the great work.
EricTheCarGuy, I want to say thanks to this videos I was able to fix my car. My car was having a no spark because of bad ASD relay. Your process of testing relay is simple and effective. This video help me identify a bad relay that prevent my car from starting. Once again thanks:)
Eric, thank you so much for a simple, yet comprehensive instruction on how to test one of these stupid things. I gotta say, your videos are some of the best. Unlike so many of the other instructional videos on youtube, you do not ramble about this, that or the other thing. You don't offer superfluous information about the job. you are direct and to the point.
As an electrical engineer who happens to really like car stuff...I approve! Great video! As long as you know some basics like this, electricity isn't all that bad. Like you said in your last video, it works a lot like water.
Yo Eric the car guy, Thank you for your channel and the education I and others received on relays!!!! Means a lot to people like me who need to repair their vehicles. God bless you for that!!!
Thanks Eric, you, as always, explain things in a simplifed, "dumbed down" (Thank God) manner that I find very helpful and informative. Please keep it up!
I had no tail lights on my 2009 Chevy Van 40,000 miles. I had brake lights. I could not find the problem. The fuse box for tail lights is under the drivers seat. I am a good mechanic but this had me stumped. It was low milage and all stock factory wiring. I took it to the dealer and the mechanic there was young. I was skeptical but he found the problem in about 1 hour. I was impressed. He found the problem in a very creative way. He could hear the relay clicking but no power. He then noticed that the OTHER RELAY in that box under the drivers seat, had the same part number so he switched them and bingo problem solved! Victory Cheverolet in Petaluma, Ca.
Hey Lucky Dog, I have the same problem with my van. No Tail lights and reverse lights but brakes and turn signals work fine. How did you or did you get the problem fixed? Thanks if you could steer me in the right direction.
Thanks Eric. I just changed a bad relay for a buddies cooling fan and tested by swapping with another relay. I get home and you have this new video up. Perfect timing I did wonder how they work. Thanks again for you information. You really do help
thanks for the video, i'm glad to see that our voices are being heard and responded to. keep up the good work, i can't wait to see what i can learn next.
I followed you directions on how to check if there is a draw on a car battery. I purchased a digital multimeter and hooked it up like you said. I found there is a 1.42 amp draw on the system. Now I am going to go through the fuses like you said. I never even knew about relays before. Very interesting.
hi eric my name is logan i just wanted to thank you for all that you do to help us out im a student at ptec in florida and im studying automotive service technology there and watching your vids has helped me out alot and helped me get a firmer grasp on what im being taught so again thank you very much if you ever need something built for you shop be it shelving or what have you let me know and ill see what i can do hope you have a good day man PLEASE THUMBS UP SO HE CAN SEE THIS
Awesome Eric! Unfortunately I cannot do much of the sophisticated complicated heavy duty auto work anymore because I'm disabled with (MS). Your tips on at least me doing surface issues are definitely fulfilling! For the other issues at least good knowledge, when and if I need to take my car to a shop at least gives me money savings heads up on making sure I'm not going to get scammed, thank you so much!
Great video. Thanks Eric. One other issue you might cover regarding relays in older automobiles is the solder points. For example: older Acuras and and Hondas can have an intermittent relay problem (probably other makes as well), where the car wont start when raining or in the morning when its cold, or if there is dew because the relay solder points are "micro" cracked. The relay may pass the bench test in a heated garage, but wont pass if damp. Google: "How to solder and fix the Main Relay."
One of the faults of the power probe is the switch, which tends to corrode when power is turned on and off at the switch. Basically you get arcing of the contacts inside the probe switch. The makers have suggested pressing the switch button when the probe is not touching anything, and then move the probe tip to the terminal you are interested in. The arcing occurs at the tip, which is easy to repair. That's a nice simple video, Eric. It seems the numbering of those terminals is universal.
Thanks for the thorough explanation! I appreciate that you give an explanation on how the relays work. It's nice to have background info on the component rather than just how to test it. Thanks so much!! 😁😁
You're awesome man! I have used the info you have provided to fix electrical problems. I also sincerely respect your "fixing it forward". Keep up the good work and God bless!
I'm really impressed with the way you teach cause it gave us different alternatives to deal every step. And that's the best way. Keep the good work. Thank you.
Good point about the diode across the coil. One thing to keep in mind is that OE relay coils driven from the PCM usually have the diode across the coil to protect the driver. Cheap universal relays sometimes doesn't have this diode and could take out your driver because of the high voltage spike. Just something to keep in mind.
Great video as always. Just a note that the diagram at the top of the relay is when it is at rest (off). I might add that I've seen relays be intermittent, so it may be useful to click the power on the low-power control-side about 10-15 times to see if it ever fails once. If it does, replace it. Also, ESI makes a relay tester (model # ESI-190) for those who need to test relays often.
Good point about the diagram shows the device at rest without any power applied. Also, the best test in my opinion for a relay is to check it under actual load conditions where current is flowing through the contacts. A voltage drop across the contact would be more meaningful than measuring resistance. I would bet the relay tester you mention would be putting a load on the contacts which is better.
I just replaced my starter solenoid just to find out the relay was bad. I’m in Brasil and autoparts stores here are almost worthless. So I opened the relay and the contacts were totally black (the burning from many years of use soots up the contacts.) I cleaned the contacts with scotchbrite and put a dab of dielectric grease to prevent the arcing that jumps the gap causing the burn marks. It’s working great. I’ll be ordering another one soon just in case. When you’re in a pinch, you might try what I did.
Eric... I love your videos, but the whole time im watching you struggle with the 4 terminals of the relay... Im thinking, theres aligator clips right there!
Yes, making/breaking higher amperage circuits with the probe tip will greatly increase switch life! Doing so is a good habit to get into! Most of (but not all) Power Probe 3's have an easily replaceable snap in switch. It's a good idea to keep a few spares on hand. The switch assembly is Power Probe's "Achilles' heel" Older Power Probes, and early PP 3's have soldered in switches that are a PITA to replace.
Eric, I gotta problem with my son's 93 Honda Accord. The dummy light for the battery comes on, but if I turn the air conditioner on, the light turns off. This morning, the brand new battery reads 3.62 V, which you know means, it didn't start. My way 9f thinking is, if the AC effects the dummy light, the AC is the problem. Please correct me if I'm wrong. Even so, I'm trying to learn how to test this thing with a basic $20 multimeter, but I'm having one hell of a time trying to figure out what to test. There's no fuse for the AC. There's a fan fuse, but nothing that say's AC. I'm watching the volt drop test you posted. You're the BEST on the net, and your vids have helped me more times than I can remember now. THANK YOU, Eric. 🙂
This was a great guide for me. I didn't have a probe and wanted to do it inside so to activate the first circuit I used 3 D batteries end to end with an alligator clip sellotaped to either end. Then just used the continuity setting on the multimeter to get a reading. Was re-assuring given my weird car problem. On a VW 109 relay it wasn't so straight forward which pins did what so there was a bit of trial and error till I worked it out. The diagram on the side wasn't helpful either(to an electronics like me anyway!). But I know I got the right ones in the end cos I tested the bejesus out of it. And I could see the metal switch go on and off and hear the continuity go on and off accordingly. Christ this is turning into a confession... Anyway thank you for the guide Sir. You're a gent.
Hello ERIC! Just a quick thing that came to mind while watching this video that might help others! Using double ended alligator clips and attach them to the DVOM leads and the other end of the clips to the relay ! Have a good one
Yes, and even the more complex topics such as voltage drop testing and dynamic resistance are easily visualized using a flowing water analogy. EE seems so far away now, but the fun stuff is still rich with color.
I'm stumped. 03 Rsx. My relays are buzzing. Condenser, radiator, and I believe is another relay that controls both condenser & radiator fans. Both fans work and fan switch works. I bypass the fan switch and the relays buzz crazy(fans not working). I also tried to turn on AC and does the same thing (with the fan switch connected). I heard the ac pressure switch might be connected to the fans somehow. Idk:( Big fan of your channel. Keep up the great work Eric!!!
This is the kind of guy I wish I had as a teacher. Two problems however; one, the schools I went to never had auto shop. For whatever reason, most schools I went to growing up (military brat, so moved very often...) had that particular shop closed/cancelled/long since forgotten. And two... well, mostly, reason one begets reason two.
it was an excellent video, explanation was spot-on and clear, also very realistic because your test leads didn't just appear in the positions to do the test.
I have had switches relays and even fuses that close and show continuity but wont handle the amp load. There is a volt drop test for that. I do like this guys videos. I've watched a bunch of them. I really like finding top dead center with my vacuum/pressure gauge. Thanks Eric
Well, I just keep a extra new relay in my Jeep and if I think a relay may be a problem I just swap with new one and see if that fixes the problem. Thats easier 😁 I did enjoy the video though!
I would suggest a happy medium. It is important to understand the theory, or even necessary. Eric seems to get into the theory a bit... but its also important to learn how to save time, money, etc effieciency of time, movement, etc..
This was perfect for DIYer. I have relays on an e-fan that had corroded prongs, cleaned those and it worked but now occasionally intermittent and I was wondering how to test the relays.
Eric, thanks again....made test leads and tested the glow plug relay, which is working. Still no glow plugs though. Checked fuses, but have read about a thermistor or timer relay on glow plugs? Possibly a hidden fuse somewhere as tachometer not working also. Your videos are the best..greetings from Spain
Very helpful video, currently have starter issues with my car, despite it working fine while running errands, it just stopped starting. Thought it was the starter, had it tested, the starter engaged but even when connected to car - starter wouldn't engage. Battery tested, said it needed to be replaced, but no dice. Remembered when my battery had low charge, it would make a clicking sound from the relay but now when the ignition is turned, there's no clicking sound, just a faint buzzing sound.
I got 2 questions: 1. Will you damage the relay if you put the 12 volt wrong? IF you do what you do, but you take the power source on the other ones and the voltometer on the others? (I guess It wont click, but will I damage it by doing wrong? 2. How do you know the correct way to put it back in?
Great Job Eric thanx for sharing most people do not understand the resistance is in the high powered contact from multiple uses they get a carbon build up from being and burnt from normal use.
Man I love your videos you have the best videos ever you explain everything you are the best teacher tutor I got to give you like a thumbs up five star rating
THANK YOU VERY MUCH. My jeep has intermittent starting and right now I have tried it several times and it will NOT start. So, I tested the relay, like you said and it did click but I couldn't get it to click again (It has 3 small studs), so I just thought I Killed it. But I put it in and it worked great. Sooo I'm pretty sure the contacts must be going bad so I will get another relay. I HATE buying things and find out that it was not the problem (I'm Not sure if there could be LOW voltage going to the relay bit I'm happy now). Fist up, Fight for Truth. PS. I hate My 2004 JGC Limited.
Awesome thanks! i have an old voltmeter (sunpro) doesn't make any sounds when touched and only has certain settings. when u said checking for ohms i believe i heard i then matched to which it was on my voltmeter. have an 82 e21 320i bmw tthat has a few things not working after checking fuses and checking wires. so now on to the relays. love how you shown how it works and talk about how and why. Awesome vid man! helped me out greatly
thanks for this video, i dont work on cars for a living but unlike most i do diagnose my own issues and sometimes i just forget how to test something or just to make sure i do a test right i hope on YT just to be sure. this video helped me diagnose a bad cooling fan relay or so i think. no clicky click, got continutity as soon as i touch ohmmeter to the relay so i presume its bad....of course i doubt it has anything to do with my car wanting to buck/lurch in lower rpm ranges...
Thank you I am working on getting certified. So this is a good review. I have online classes with a webcam. So someone explaining a relay in simple terms and not saying come on come on what's the answer.
This video is very informative, on problem solving my failed signal light and hazards with the front yellow lights still on, but didn't flash; on my 2006 Toyota corolla. Still needs fixing, waiting on new signal switch to deliver hoping it will solve the problem. I don't hear the clicking and I've replaced the relay already.
freaking awesome....i love electrical issues....somthing about it intrigues me me....i just did a fuel solenoid vid....i may post a vid response ;) have a great day mr awesome!
That was extremely interesting. I had always thought that the magnet moved through the center of the coil to contact and close the circuit. Interesting that the coil actually uses magnetic force to pull a contact towards itself instead.
Thanks for all your helpful videos, Eirc. I was wondering... do relays ever stick "closed" on the high amp side such as causing secondary air pump not to shut off resulting in motor burn out? Thanks.
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](http://i.ytimg.com/vi/S-DwV0HLsE4/mqdefault.jpg)
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](/img/tr.png)
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Im 21, I have 5 ASE's and work in a independent repair shop. I watch your videos in my free time trying to learn all i can. You really have helped me in the real world diagnosing problems and understanding systems. thanks for the videos you make!! it has made me a better technician!
I would also recommend you to check south main auto repair channel. Lots of good stuff there, good luck in the automotive world.
Thanx Eric TheCarGuy and Aaron Houk (couple comments below) Fixed the ole ladies car in less than 4 hours. That includes watching this and a few different vids, WALKING to the Hardware store, grabbing a Gerry can of fuel, changing the batteries in my flash light, a quick jaunt to the beer store, a conference with the neighbourhood guys (who saw a hood up and were drawn like flies to shit.... they didn't help, but drank my beer), and lastly actually doing the repairs. I'm a hero for less than an hour actual work. Keep up the great work.
EricTheCarGuy, I want to say thanks to this videos I was able to fix my car. My car was having a no spark because of bad ASD relay. Your process of testing relay is simple and effective. This video help me identify a bad relay that prevent my car from starting. Once again thanks:)
eric please do not ever retire .you make the best vids you explain everything in detail
Eric you are an excellent car repair instructor. I have learned so much watching your videos. God Bless..!!!
You have saved people countless dollars with your well-done videos. Thank you Sir!
Eric, thank you so much for a simple, yet comprehensive instruction on how to test one of these stupid things. I gotta say, your videos are some of the best. Unlike so many of the other instructional videos on youtube, you do not ramble about this, that or the other thing. You don't offer superfluous information about the job. you are direct and to the point.
As an electrical engineer who happens to really like car stuff...I approve! Great video! As long as you know some basics like this, electricity isn't all that bad. Like you said in your last video, it works a lot like water.
Very well illustrated. I am a retired electrical engineer & that is exactly how you should test a relay. Well done....
This is the best video I have ever seen to clearly and effectively explain how a relay works and how to test it.
Yo Eric the car guy,
Thank you for your channel and the education I and others received on relays!!!! Means a
lot to people like me who need to repair their vehicles. God bless you for that!!!
Thanks Eric, you, as always, explain things in a simplifed, "dumbed down" (Thank God) manner that I find very helpful and informative. Please keep it up!
I had no tail lights on my 2009 Chevy Van 40,000 miles.
I had brake lights.
I could not find the problem. The fuse box for tail lights is under the drivers seat.
I am a good mechanic but this had me stumped. It was low milage and all stock factory wiring.
I took it to the dealer and the mechanic there was young. I was skeptical but he found the problem in about 1 hour. I was impressed.
He found the problem in a very creative way. He could hear the relay clicking but no power. He then noticed that the OTHER RELAY in that box under the drivers seat, had the same part number so he switched them and bingo problem solved!
Victory Cheverolet in Petaluma, Ca.
lol, it took an hour to swap a relay?
salazam The mechanic had to find the problem first.
Hey Lucky Dog, I have the same problem with my van. No Tail lights and reverse lights but brakes and turn signals work fine. How did you or did you get the problem fixed? Thanks if you could steer me in the right direction.
Ernest Makainai Relay under the front seat, There are two relays, and on my 2009 they are both the same part no.
Lucky Dog That relay malfunctioned at 40,000 miles! Not very good.
I have no extra lights and was not using a trailer.
Thanks Eric. I just changed a bad relay for a buddies cooling fan and tested by swapping with another relay. I get home and you have this new video up. Perfect timing I did wonder how they work. Thanks again for you information. You really do help
thanks for the video, i'm glad to see that our voices are being heard and responded to. keep up the good work, i can't wait to see what i can learn next.
I followed you directions on how to check if there is a draw on a car battery. I purchased a digital multimeter and hooked it up like you said. I found there is a 1.42 amp draw on the system. Now I am going to go through the fuses like you said. I never even knew about relays before. Very interesting.
Received 0.02 milliamps within parasitic engine off DC voltage draw, thanks to Eric. He isn't a gimmick, Eric has extraordinary experience.
hi eric my name is logan i just wanted to thank you for all that you do to help us out im a student at ptec in florida and im studying automotive service technology there and watching your vids has helped me out alot and helped me get a firmer grasp on what im being taught so again thank you very much if you ever need something built for you shop be it shelving or what have you let me know and ill see what i can do hope you have a good day man PLEASE THUMBS UP SO HE CAN SEE THIS
Thanks! You saved me $20 and a trip to NAPA. Still don't have taillights on my POS 2002 Dodge 1500, but the relay checked out fine.
Awesome Eric! Unfortunately I cannot do much of the sophisticated complicated heavy duty auto work anymore because I'm disabled with (MS). Your tips on at least me doing surface issues are definitely fulfilling! For the other issues at least good knowledge, when and if I need to take my car to a shop at least gives me money savings heads up on making sure I'm not going to get scammed, thank you so much!
Great video. Thanks Eric. One other issue you might cover regarding relays in older automobiles is the solder points. For example: older Acuras and and Hondas can have an intermittent relay problem (probably other makes as well), where the car wont start when raining or in the morning when its cold, or if there is dew because the relay solder points are "micro" cracked. The relay may pass the bench test in a heated garage, but wont pass if damp. Google: "How to solder and fix the Main Relay."
You have a, 'Style, Eric, a Style I call----"The Style, without a style."
And I think we all LIKE it!
One of the faults of the power probe is the switch, which tends to corrode when power is turned on and off at the switch. Basically you get arcing of the contacts inside the probe switch. The makers have suggested pressing the switch button when the probe is not touching anything, and then move the probe tip to the terminal you are interested in. The arcing occurs at the tip, which is easy to repair.
That's a nice simple video, Eric. It seems the numbering of those terminals is universal.
Thanks for the thorough explanation! I appreciate that you give an explanation on how the relays work. It's nice to have background info on the component rather than just how to test it. Thanks so much!! 😁😁
You're awesome man! I have used the info you have provided to fix electrical problems. I also sincerely respect your "fixing it forward". Keep up the good work and God bless!
I'm really impressed with the way you teach cause it gave us different alternatives to deal every step. And that's the best way. Keep the good work. Thank you.
Thanks Eric, i looked at a few other relay test vid but none was as good and clear as yours, THANKS CHAMP, once again you have helped me out.
Good point about the diode across the coil. One thing to keep in mind is that OE relay coils driven from the PCM usually have the diode across the coil to protect the driver. Cheap universal relays sometimes doesn't have this diode and could take out your driver because of the high voltage spike. Just something to keep in mind.
I like to listen people they know their trade really well. I learned something good today. Thanks!
Eric have you ever thought about becoming a educator in a Tech School? You have a talent & you make it interesting!
Wow that was explained very well. You should give car lessons in schools lol.
youtube university dawg.
I like it
Very good video. Years later it is still teaching people. Thanks!
Great video as always. Just a note that the diagram at the top of the relay is when it is at rest (off). I might add that I've seen relays be intermittent, so it may be useful to click the power on the low-power control-side about 10-15 times to see if it ever fails once. If it does, replace it. Also, ESI makes a relay tester (model # ESI-190) for those who need to test relays often.
Good point about the diagram shows the device at rest without any power applied. Also, the best test in my opinion for a relay is to check it under actual load conditions where current is flowing through the contacts. A voltage drop across the contact would be more meaningful than measuring resistance. I would bet the relay tester you mention would be putting a load on the contacts which is better.
This helped me to test my Air Conditioner's relay. Thanks!
I just replaced my starter solenoid just to find out the relay was bad. I’m in Brasil and autoparts stores here are almost worthless. So I opened the relay and the contacts were totally black (the burning from many years of use soots up the contacts.)
I cleaned the contacts with scotchbrite and put a dab of dielectric grease to prevent the arcing that jumps the gap causing the burn marks.
It’s working great. I’ll be ordering another one soon just in case. When you’re in a pinch, you might try what I did.
Eric... I love your videos, but the whole time im watching you struggle with the 4 terminals of the relay... Im thinking, theres aligator clips right there!
Helped me diagnose my ac relay today. I appreciate your videos. Thank you
Great explanation! Have you considered taking on another set of hands as a trainee? Like an apprentice or intern?
i have been asking Peggy Noonan the same question since March.
Yes, making/breaking higher amperage circuits with the probe tip will greatly increase switch life! Doing so is a good habit to get into!
Most of (but not all) Power Probe 3's have an easily replaceable snap in switch. It's a good idea to keep a few spares on hand. The switch assembly is Power Probe's "Achilles' heel"
Older Power Probes, and early PP 3's have soldered in switches that are a PITA to replace.
Eric, I gotta problem with my son's 93 Honda Accord. The dummy light for the battery comes on, but if I turn the air conditioner on, the light turns off.
This morning, the brand new battery reads 3.62 V, which you know means, it didn't start.
My way 9f thinking is, if the AC effects the dummy light, the AC is the problem. Please correct me if I'm wrong.
Even so, I'm trying to learn how to test this thing with a basic $20 multimeter, but I'm having one hell of a time trying to figure out what to test. There's no fuse for the AC. There's a fan fuse, but nothing that say's AC.
I'm watching the volt drop test you posted.
You're the BEST on the net, and your vids have helped me more times than I can remember now.
THANK YOU, Eric. 🙂
This was a great guide for me. I didn't have a probe and wanted to do it inside so to activate the first circuit I used 3 D batteries end to end with an alligator clip sellotaped to either end. Then just used the continuity setting on the multimeter to get a reading. Was re-assuring given my weird car problem. On a VW 109 relay it wasn't so straight forward which pins did what so there was a bit of trial and error till I worked it out. The diagram on the side wasn't helpful either(to an electronics like me anyway!). But I know I got the right ones in the end cos I tested the bejesus out of it. And I could see the metal switch go on and off and hear the continuity go on and off accordingly.
Christ this is turning into a confession...
Anyway thank you for the guide Sir. You're a gent.
Really ought check the secondary circuit under load. Sometimes dirty contacts will not show unless they're loaded.
Hello ERIC! Just a quick thing that came to mind while watching this video that might help others! Using double ended alligator clips and attach them to the DVOM leads and the other end of the clips to the relay !
Have a good one
Yes, and even the more complex topics such as voltage drop testing and dynamic resistance are easily visualized using a flowing water analogy. EE seems so far away now, but the fun stuff is still rich with color.
Thanks for help , 2 relays were replaced and solved the not starting problem
I'm stumped. 03 Rsx. My relays are buzzing. Condenser, radiator, and I believe is another relay that controls both condenser & radiator fans. Both fans work and fan switch works. I bypass the fan switch and the relays buzz crazy(fans not working). I also tried to turn on AC and does the same thing (with the fan switch connected). I heard the ac pressure switch might be connected to the fans somehow. Idk:( Big fan of your channel. Keep up the great work Eric!!!
I LOVE YOU ERIC!! YOU SERIOUSLY SAVED ME TONS OF MONEY AND TIME!!!
Thanks for posting Eric. Another highly informative video, it been helping me in my school .. you are the dude! 👍
This is the kind of guy I wish I had as a teacher. Two problems however; one, the schools I went to never had auto shop. For whatever reason, most schools I went to growing up (military brat, so moved very often...) had that particular shop closed/cancelled/long since forgotten. And two... well, mostly, reason one begets reason two.
it was an excellent video, explanation was spot-on and clear, also very realistic because your test leads didn't just appear in the positions to do the test.
can't get a better car instructor then eric by far very good
Great video Eric! Thanks for sharing! This is great for individuals learning how to check/test relays.
I have had switches relays and even fuses that close and show continuity but wont handle the amp load. There is a volt drop test for that. I do like this guys videos. I've watched a bunch of them. I really like finding top dead center with my vacuum/pressure gauge. Thanks Eric
Well, I just keep a extra new relay in my Jeep and if I think a relay may be a problem I just swap with new one and see if that fixes the problem. Thats easier 😁 I did enjoy the video though!
great video on relay...plain straight and simple to understand...keep 'em comin', eric...kudos!!!!!
Dude! First video I saw of yours. Incredibly helpful! Thanks a million!
Thank you for the demonstration of how to test your relays. Very helpful.
come on man eric has done a grate job please give him that .
good job eric keep up the good work .
I would suggest a happy medium. It is important to understand the theory, or even necessary. Eric seems to get into the theory a bit... but its also important to learn how to save time, money, etc effieciency of time, movement, etc..
This was perfect for DIYer. I have relays on an e-fan that had corroded prongs, cleaned those and it worked but now occasionally intermittent and I was wondering how to test the relays.
Eric, thanks again....made test leads and tested the glow plug relay, which is working. Still no glow plugs though. Checked fuses, but have read about a thermistor or timer relay on glow plugs? Possibly a hidden fuse somewhere as tachometer not working also. Your videos are the best..greetings from Spain
Thanks Eric, good explanation of what a relay does, how a relay works and simple testing techniques.
That's so much for your help Im having trouble with cooling fan relays, I will try your suggestion on test my relays .
Very helpful video, currently have starter issues with my car, despite it working fine while running errands, it just stopped starting. Thought it was the starter, had it tested, the starter engaged but even when connected to car - starter wouldn't engage. Battery tested, said it needed to be replaced, but no dice. Remembered when my battery had low charge, it would make a clicking sound from the relay but now when the ignition is turned, there's no clicking sound, just a faint buzzing sound.
Thanks for the great tutorial. I have saved so many $$$$ because of this video. May God bless you and God bless you tube.
great video, its good to get a proper explanation of how automotive relays work thanks
Hi I have a Honda 2008 I can not locate the PGM-FI Can you help please
Very clear description and visual demonstration on how they work. Cheers!
That was a fantastic video Eric, I actually searched this up not long ago and the useless video just said to try a different or new relay to test it
Dude, your videos are awesome! Thank you for doing this.. Currently doing a project 2002 Toyota Celica GT that's got some electrical issues.
I got 2 questions:
1. Will you damage the relay if you put the 12 volt wrong? IF you do what you do, but you take the power source on the other ones and the voltometer on the others? (I guess It wont click, but will I damage it by doing wrong?
2. How do you know the correct way to put it back in?
Great Job Eric thanx for sharing most people do not understand the resistance is in the high powered contact from multiple uses they get a carbon build up from being and burnt from normal use.
Man I love your videos you have the best videos ever you explain everything you are the best teacher tutor I got to give you like a thumbs up five star rating
thanks a lot for showing the closeup of the relay, really hammers home the concept
use those alligator clip on your probes of your meter and you wont need another hand.. Love your videos. Keep em coming
Great explanation of how a relay works & what it does.
i was surprised there was no current in the high amp side when you did the testing. appreciate your videos.
Well done! Detailed, easy to understand. Much appreciated!
Thanks! Could I use any relay in my fuse box that is exactly the same but different color? Does it matter??
Eric man thanks for this video the way you explain things are very clear and easy to understand.
THANK YOU VERY MUCH. My jeep has intermittent starting and right now I have tried it several times and it will NOT start. So, I tested the relay, like you said and it did click but I couldn't get it to click again (It has 3 small studs), so I just thought I Killed it. But I put it in and it worked great. Sooo I'm pretty sure the contacts must be going bad so I will get another relay. I HATE buying things and find out that it was not the problem (I'm Not sure if there could be LOW voltage going to the relay bit I'm happy now). Fist up, Fight for Truth. PS. I hate My 2004 JGC Limited.
Awesome thanks! i have an old voltmeter (sunpro) doesn't make any sounds when touched and only has certain settings. when u said checking for ohms i believe i heard i then matched to which it was on my voltmeter. have an 82 e21 320i bmw tthat has a few things not working after checking fuses and checking wires. so now on to the relays. love how you shown how it works and talk about how and why. Awesome vid man! helped me out greatly
thanks for this video, i dont work on cars for a living but unlike most i do diagnose my own issues and sometimes i just forget how to test something or just to make sure i do a test right i hope on YT just to be sure. this video helped me diagnose a bad cooling fan relay or so i think. no clicky click, got continutity as soon as i touch ohmmeter to the relay so i presume its bad....of course i doubt it has anything to do with my car wanting to buck/lurch in lower rpm ranges...
i had a car do that for a while. it was a loose vacuum line in mine. good luck.
All your videos are so helpful and informative. Thank you!
Thank you I am working on getting certified. So this is a good review. I have online classes with a webcam. So someone explaining a relay in simple terms and not saying come on come on what's the answer.
Thank you Eric
Your a good teacher Eric for the learners of electrical problems your a big help thank you.iv watched scanner danner but he just loses me
This video is very informative, on problem solving my failed signal light and hazards with the front yellow lights still on, but didn't flash; on my 2006 Toyota corolla. Still needs fixing, waiting on new signal switch to deliver hoping it will solve the problem. I don't hear the clicking and I've replaced the relay already.
Nice vid Eric...interesting stuff.
I now understand! Thanks for this very clear and helpful video.
freaking awesome....i love electrical issues....somthing about it intrigues me me....i just did a fuel solenoid vid....i may post a vid response ;) have a great day mr awesome!
Garage looks clean and organized good sign.
Thank you Eric for making a great and educational video.
This was very helpful in understanding hvac relays
That was extremely interesting. I had always thought that the magnet moved through the center of the coil to contact and close the circuit. Interesting that the coil actually uses magnetic force to pull a contact towards itself instead.
Excellent job, as usual
Eric, U da man. Incredible channel...thanksa lot for sharing knowledge !
Big hug from Norway / Erik
Awesome, car stuff is fun... love it!!! I said the same thing when watching your video right before you said it...
Yes, electronic/electrical work is great! Pays well; plus all the little electrons don't stink, and never dribble out and make a mess!
Thanks for all your helpful videos, Eirc. I was wondering... do relays ever stick "closed" on the high amp side such as causing secondary air pump not to shut off resulting in motor burn out? Thanks.