CARDONE PROTECH #3: Kirschoff's Law And The ONE Electrical Diagnostic Technique You MUST Master
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- เผยแพร่เมื่อ 14 ส.ค. 2022
- #cardone #motorage #automotiverepair #electronics #ecm #pcm #ohmslaw #voltage #resistance #current #amps #ohms #voltagedrop #testingelectricalcircuits
Last time on PROTECH, I showed you how voltage, resistance, and current interact. We learned that when resistance in the circuit increases, current in the circuit decreases - and the component operated by the circuit won’t function as it should if it functions at all!
I also told you that most electrical faults you face are caused by these changes in resistance and shared a few examples.
Today, I’m going to tell you how to find those faults.
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You, my good sir, are the gold standard for teaching this subject. Can’t thank you enough.
I've looked so hard for someone that could explain things in a way I could understand. I really appreciate you. You have the heart of a teacher!
And don't forget folks. this test only works when the circuit is On. And current is flowing. Otherwise the readings will be different!
I’m it’s pretty obvious if you’re testing voltage drop you have to have voltage…..
This man is a total legend. He has helped me so much in my quest of becoming a vehicle technician.
Thank you for those kind words. They are much appreciated.
What a great teacher!
So glad I found your channel. You are a fantastic teacher, very articulate, and obviously a very smart guy who is obviously well rounded in many subjects.
Pete, you're a great Teacher. You break everything down and make it very easy to understand. I have learned a lot from watching your Video's and look forward to learning more. Thank you for taking time to teach others.
I appreciate that. Glad you find these helpful!
WoW Pete I really loved your video! It was simple and easy to understand Kirchoff applied to troubleshooting circuit!😁
I encourage everyone to watch your video Taking The Mystery out of Voltage Drop Testing a great video. This video "is not" your best work. I've relearned and learned a lot from your video's. Pete you're still the best, keep them coming.
I would give you 2 likes for this one if I could. Great explanation.
Best electrical troubleshooting course EVER
A Rock Star in the Auto Electrical world... Thanks again Sir
Wow! Thanks!
Amazing electricity class, nobody here talks about Kirchhoff, they still stay with Ohm, thank you and take good care of yourself
Pete thanks again for another excellent video. These videos have helped make me a better diagnostician.
I didn’t remember what Kirchoff’s law was but I know you misspelled it. Great video!
Thanks for sharing Pete! Useful stuff.
Glad it was helpful!
Reminder for anyone using this technique. I have seen switches with an L.E.D. that were designed with significant resistance. so be sure to keep that in mind other wise you might spend hours just to find a properly functioning switch.
Excellent explanation! Thank you for taking the time to share this
Great explanation ... this is starting to make sense.
Very nice demo. reminds me of the old days training at MEA. I truly hope you get this across to a lot of guys in the field. This is something that is seriously lacking in practice these days. God bless man. Great video!
Thank you very much!
Hi Joe . Just wanted to let you know that I appreciate your contributions to the trade / our development .
@@ThunderbirdRocket much appreciated sir.
Joe , I hope you are doing well .
Love all your tutorials . Cant understand most of it .....But working on it !!!!!
Excellent presentation. I love your sense of humor.
Excelente lesson
Absolute best video that visually shows what and how to understand/identify voltage drop in a circuit. Thank you!
Thank you sir. If i had the same techear like you , i would have saved a lot of time. Sorry for my English if i missspelled.
Thanks for your dedication to provide this online classroom / tutorial . Your passion is evident in everything you do . Much appreciation sir . If you don’t mind I’d like to call you Coach because we are taking a lesson from the best !
Thanks! Appreciate the kind words!
Thanks Mr Pete for the constant reminder and training
6:02 Little mouths to feed, I genuinely LOL'd
This was great lesson 😊
What do you call INTELLECTUAL AND PRODIGY and SUBSTANTIAL add one more KNOWLEDGEABLE the answer is Sir Pete Meier Motor Age
My teacher ,thank you very much helpful video ,take care and have a great day
Sir Pete Meier Motor Age
From Nick Ayivor from London England UK 🇬🇧
NICk AYIVOR , Sir Pete will be coming to London England UK next week to see you , so don't be out will you, 😅😅😅
Old mechanic n Electrician I had trouble shoot many electrical problems on cars n found n fixed but I never tried or thought to find resistance the way you described it is great on burnout components but with all this new electronics modules it’s hard to find even with all this new fancy n expensive diagnostic testers with thousand of information I do get lost.😢
THANKS AGAIN PETE : I APPRECIATE YOU !!!
Thanks Pete. You are awesome 👌
Очень наглядно, видно понимает и старался человек)
Good explanation ! - thanks
Thanks for watching!
Great video 👍🏻
great teacher
This content is so badass.
Great instructional video, demonstrating it on your board helped visualize the proper procedure in performing a voltage drop test. Thanks again.
Great job
Thanks Pete. You are an awesome teacher. Love your videos.
Mirroring what everyone else has said - this is a great video, very clear. Thank you!
awesome,
great channel I'm in.
thanks
Awesome once Again!,,
Yes, that’s a good way to explain it, to folk that normally deal with mechanical issues.
As an electronic tech, it feels wrong to me, because we were trained to make all volt measurements with respect to ground. In reality, if you understand ohms law and you can do simple subtraction, then the technique is actually the same, but definitely easier to understand, for the untrained, this way.
I’m going to adopt this method, when asking people to do things for me, remotely. It’s much more likely they’ll do it right, if they understand why they’re doing it, and I can easily convert their readings back to what I’d get, doing it the conventional way, if I was on site.
Nice tip, thank you.
At 17:48 was when you may have inadvertently confused a lot of viewers. You were testing the theory of whether or not you were 'truly on the ground side' with both leads. You then revealed another load (i.e., a second lightbulb) that you had hidden behind the test board.
In a real world application, there normally wouldn't be two or more loads in a circuit. That, of course, would cause a voltage drop - your primary topic of discussion here. You then left the video open-ended by not explaining to the viewers how you were actually able to obtain a measurable amount of voltage on a multimeter, even though it appeared as though you had both of your leads on the ground side.
Aside from that, this was a great instructional video. It was very informative and well-explained.
I am a fairly new subscriber of your channel. I enjoy watching your videos; they are very educational.
To the viewers that didn't understand what he was demonstrating towards the end:
When it comes to detecting voltage in a circuit, it ultimately doesn't matter what 'side' of the circuit you have your leads on; a voltage reading on a multimeter works by measuring the POTENTIAL DIFFERENCE between what is on the outside of your leads, and what is on the inside (between your two leads).
Simply put, voltage is PRESSURE.
"What is the DIFFERENCE in the voltage between the outside and the inside of my leads, ANYWHERE in the circuit?..."
The hidden bulb was demonstrating a fault in the circuit which is discoverable as a load or resistance. An example might be corrosion in a connector. He is demonstrating an incredibly useful procedure for finding faults in an automotive circuit.
Very good!!! Thank you very much!!!
Thanks you so nuch Sir for the knowledge you have shared. It has immensely benefitted me. Take care Sir and knows that through your efforts we are blessed. 🙏
Awesome I loved when you pulled the light bulb out great example
Brilliant display, illustrations and lessons
Thanks
Thanks for all your knowledge and teachings.
Love the videos, I work in the automotive industry at a major OEM. It's very rare I get hands on, great to watch these videos as a reminder
Thank you for posting this video. It really helps a lot! Keep up the good work.
Hi mr Pete!Really appreciate for your time and sharing knowledge with us.👏
Thank you for explaining it in a very understandable way. What are the most common forms of resistance encountered?
In my experience, it is usually on the ground side - corrosion, damaged connector fit, loose connections.
I think #1 would be bad grounds. Then the "green crusties" aka oxidized contacts!
You have helped me understand so much. Thank you.
Fantastic Video.
Great teacher.
Thanks
Gold Bless you sir,🙏🙏🙏
Excellent info
Thanks
I really appreciate this guy !
very educative. Thank you Regards
Great Video Pete thank you!
Excellent instruction Pete - electrical testing indeed takes practice to fully grasp and lock in understanding. I took some electronic schooling years ago - studied theory in the books - BUT - still when doing lab testing - as you teach with your demonstration circuit would find out that to read about electrical principles and actually apply that knowledge in a real world situations / problems IS NOT AS EASY AS ONE WOULD THINK - PROPERLY TROUBLESHOOTING and DIAGNOSING takes practice and time ( experience ) before one really understands what is actually occurring. Many Thanks 🙂✌️
Nicely explained. Together with the electrical diagrams of the vehicle it should make fault finding quite easy, most of the time.
Thanks for making me feel dumb. Seeing it done it makes all the sense in the world why and how you can test the voltage on the negative or positive side exclusively. But I never knew you could. Thanks teach 👍
Thank you very much sir for not being tired of teaching,,especially this video,although very basic but no doubt it can be overlook to do so....thank you so much sir I always eager to watch your videos, I gain more knowledge from you god bless you always and have a good health always...😊
I am really enjoying learning from you. This system works fine if the resistance is the same between a hot car and a cold one. But what if the circuit you are testing for is one thing when cold and another when hot? Of course, the reason for the resistance I think would be that as the engine warms up, some components (or grounds) would change their resistance, right?
Resistance shouldn't change with few exceptions. A light bulb, for example, or the mechanical resistance a motor of any kind endures under load. In all cases, the measured voltage drop should remain constant. Trust the meter.
temperature has influence on resistance, higher temperature increases resistance
Great video, wish that I could have understood this when I started as a mechanic in 1964. Of course back in 1964 Meters were not small and affordable as they are today. Of course the shop were you worked had one on a stand that could be rolled over to the vehicle you were working on.
@mystic24100 .
Kirschoff's Law was taught to me at my UK Technical School in 1960.
A very forward thinking British civil servant, Beveridge, drew up the 1944 Education Act planning for eventual peace after war.
Sadly successive UK governments don't have vision to teach science which included building construction, metalworking and woodworking 38 weeks a school year.
Abandoned in 1964, such a backwards step compared to the rest of the world.
1963, my first job after school, working as an industrial electrical apprentice in a very scientific and progressive tannery producing gloving leather.
Progressive inasmuch gloves made with Pittards leather were washable.
During my five year apprenticeship the company built and opened the most modern tannery in the world.
My belief, as the maintenance and development workshop was combined in one building.
An area that contained the boiler house, steam boilers dealing with the massive demand for hot water and steam for manufacturing processes.
Plus a steam engine driving an alternator in parallel with the UK national grid. In 1946 being the first UK company to be licensed to generate in parallel with the grid.
I was in the same position as you with very limited instrumentation when the electrical workshop was performing a great deal of development work integrating and designing electronic controls before other electrical companies knew of the requirements.
The lack of science was sharing one Avo Model 7 (from memory) multimeter between six electricians and two apprentices.
Working on two factory sites originally with 300 manual worker's many individual using leather processing machines with an average motor size of 5 HP, some much bigger.
The firm had an enormous R&D budget but a single multimeter which if it was damaged there was no backup with a second multimeter.
A five digit multimeter for the price of £20, an R&D quality for £130 at today's prices looking back the options of 80 year's ago.
Someone PLEASE get this well-deserving man an AIR CONDITIONER for the shop!!
Awesome 😊
Muchas gracias. México!
Happy independence Day India 🇮🇳!!
Did he have the meter on volts all the times or did he have it on ohms when he had the load off?
where the hell has this guy been hiding? his teaching methods have been exactly what is misising in almost eveything i have been studying for years. do you teach guitar by any chance?
Also the sum of voltage drops or IR drops will = the applied voltage.
How was there positive voltage on ground side...was it a short to ground?
resistance to ground is a major problem you absolutely have to have a good ground I put extra grounds on my vehicle I ground the engine to the Frame and frame to the body engine to the body same way with the battery its grounded to the frame body and engine
Question. If all the available voltage will be consumed by all sources of resistance in a circuit as Kirchoff's law states then how can there be the current flow necessary for the circuit to function. Won't there always be some measurable voltage however low after the load close to the battery ensuring current flow. In other words if there was "0" voltage how could current keep flowing back to the battery.
Great question! Current is a measure of electron flow, not potential electrical energy. Think of the electron as a kid with a school backpack on, full of electrical energy at the start. Every time the kid passes a source of resistance, he (or she) has to give up some of that energy to get past it. By the end, the backpack is empty but the kid still made the trip all the way around.
Remember, voltage is a measure of the potential between any two points in a circuit!
a lot of electrical problems can cause codes that are false from the alternator being bad and spiking the system with ac voltage and the battery having ac voltage to the point where it has to be replaced I had a Chrysler van set a crank sensor code and it was a bad alternator
Geart work
Why are you getting 200mv on the ground side of circuit past the thief? Shouldn't it be closer to 30mv?
What would the load be on a older cruise control unit? I.e. 2007 model.
Depends on what has the problem. The control unit itself is a load, as is any actuator that it controls. Anything that does work is a load.
yeah sir.. baseball. base circuit
This method will only work when you are dealing will bulbs, alternators etc (dc_dc).....It will not work when working with car sensors that include the ecu .....The Ecu since it involves semiconductors will require a different approach......
Uncle Kirchoff says. ......... Divide and conquer.
👍
2
These new, one year old videos are much better than your early attempts at explaining voltage drop
good wire should consume less than 500 mv..
You may want to check your spelling with the due respect to Mr. Gustav Kirchhoff. ;-).
Thanks for catching that! My apologies to Mr. Kirchhoff.
Kirchoff, not Kirschoff.
Pronounced "Kirkoff".
So close...yet Kirchhoff, not Kirchoff.
@@juergenscholl2843 Mine was closer. Who in the hell puts two HHs in a row anyway?
@@btasler Yet so far.....
Obviously the Kirchhoff family did... ;-) (and they weren't ashamed to top that with a double f as well).
@@juergenscholl2843 maybe so, but there is ample proof that I didn't have to Google it first... did you?
His name is Gustav Robert Kirchhoff (German: [ˈkɪʁçhɔf] ), not Kirschoff. See also the pronunciation. Kirsch is a brandy distilled from the fermented juice of cherries, while Kirch is church.🙂
I thought it was "kirchoffs" law with a "c" ...(ker-coughs)...
Kirchoff, Kirchoff KIRCHOFF😢 pronounced "kirk ovs" law by every great electronics teacher I ever had 70s thru the 1980s this isn't important..but the guy was pretty smart.
He even says Kirschoff...LOL. It is Kirchhoff's circuit laws.
Always said it was Ketchup law, 😁😁😀
You might want to check your spelling and pronunciation. It is Kirchhoffs Law
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