The Trainer #73: Automotive Electrical Fundamentals - Improve Your Electrical Troubleshooting Skills
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- เผยแพร่เมื่อ 2 ม.ค. 2018
- #OhmsLaw #KirchoffsLaw #resistance #voltage #amperage #ohms #current #voltagedrop
Electrical troubleshooting is, for many of us, a challenge. I think it’s similar to a pilot who flies in VFR (Visual Flight Rules) conditions versus one who flies in IFR (Instrument Flight Rules) conditions. The VFR pilot relies on outside references to maintain control of his airplane; how the nose of the plane looks compared to the horizon, how the wing tip angles on either side align relative to the horizon, and the G-forces at play on his body. Sure, the instruments play a role just as they do when we drive a car, providing speed and other important information to further that control.
The IFR pilot, though, is dependent on those instruments and must actively ignore what his eyes and senses may be telling him. Often, there is no outside visual reference at all - nothing but sheer white caused by the enveloping clouds gathered around him. Imagine driving your car without outside visual clues!
Maybe it’s the same here. Electrical problems are often hidden from view, if not entirely invisible to our sight. There are no audible clues, either, unless the harness is on fire! We have to rely on our tools and our knowledge, often actively ignoring what our emotions may be telling us.
The tool part is easy. For the majority of problems we need to locate, our trusty DMM (Digital Multimeter) will do the job. The knowledge, on the other hand, may be lacking. We need to know our fundamentals inside and out, and understand the laws that govern electrical circuits. And, just as the VFR pilot ill prepared for IFR conditions will succumb to vertigo and spiral to the ground, techs failing to master these fundamentals will find themselves flying in circles, and wasting valuable time when dealing with electrical faults.
In this edition of The Trainer, we’ll teach you how to fly IFR with your DMM and troubleshoot electrical concerns with confidence!
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Due to factors beyond the control of Motor Age, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Motor Age magazine (UBM Americas - Automotive Group) assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Motor Age recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of Motor Age, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Motor Age magazine or its corporate parent, UBM Americas. - ยานยนต์และพาหนะ
I’ve been going through hell trying to find the electrical issue with my 2017 mustang and knew NOTHING about electricity so I’ve watched hundreds of TH-cam videos and this is the only one I was able to grasp and now I understand how electricity works. Thank you
Glad it helped!
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Sir, this is brilliant. A 63 years old apprentice 👍
This guy is easy to listen to. Thanks for the video.
I’m an automotive technician and this is by far the best voltage drop video I have ever seen!
the best intro for automotive electrical work and troubleshooting.
Thank you, you didn't use the water in a hose analogy and for the first time in my life I understand what is being explained, and that's saying something, I'm 59. Always wanted to understand but never could so I avoided it, not anymore. Wow, really man, thanks for explaining in a way that I finally get it.
Glad it helped!
From this point,I'm not studying with any other trainer on line but u PETE,ur name deserves all cap letters,ur training exercises incorporated with my critical thinking,is gonna advance my skills to the next level,long before my instructor anticipated,thank u much.
Thank you for knowledge and time sir. All the way from Australia.
This video alone has taught me more than a year of auto tech when I was in high school.
Glad it helped, and if you really want to show deep appreciation,,,,🤔,,you can transfer some 'funds' into Pete's account,and a few to me for the suggestion 🙂 Lol
19:05
The Electron is fascinating. Travels at almost the speed of light. With pressure behind them you better get out of the way. I love this video. Third time watching. Enjoy Petes presentation of the circuits and his knowledge of Automotive Electricity.
Best video / presentation I've seen on this!
Thank You! Super awesome video. Very well organized and well put together!
You are a good teacher. Thanks for the video.
Super job. Best on the web, in my opinion. Thank you, Sir.
Thank you!
Solid video my man! Damn, that a lot of knowledge! Thanks for sharing. 👍
I am so thankful for you and these videos, you’re refreshing my memory on everything I learned in tech school and had forgot. If you don’t use it you lose it. Also you provide better information than most of the courses I’ve taken.
Excellent knowledge and teaching skills
Thank you for sharing! 🙏
Well made, very informative and well explained videos! I am hooked on your “the trainer” series! Almost like a technical institute on TH-cam! Cant beat years of experience! Thank you and everyone that helps make all these videos!
Thanks Chuck!
Deseeeepiosososoeoooosisosososkiissoeoekekekkejeidie I’ll skisieiodiidissoksksksskskskslskksskisksldwpwlellqlqplkkke kelwlww if you want to just let
You are a wealth of knowledge
I ENJOY YOUR TRAINING CLASSES. YOUR PERSPECTIVE HELPS ME UNDERSTAND IN A NEW WAY.
Man thank you so much! Seriously helped me get my head wrapped around the actual troubleshooting process so much better than I've ever understood it before! You have a gift for explaining things in comprehensible terms.
Thank you very much for the information.
Thank you! This course one lesson would have cost me a couple hundred dollars from a university. You are a great teacher, and you have improved my life. Thank you, thank you! God bless you.
Thank you! I'm very glad you found it helpful.
Very useful indeed. Thank you Sir
You're a fantastic teacher, Pete! Thank you for this wonderful resource you have given to those of us trying to learn this stuff.
Thank you. I'm glad you found it useful.
Very impressed. Proper fundamental teaching has given me a whole new understanding.
Thank you! I'm glad it was helpful. Be sure to check out our latest offerings on electrical testing techniques!
I'm an Automotive Technology Student, Just got my Fluke 88V. Im very motivated with my new DVOM, Im striving towards becoming an ASE Certified Electrical Diagnostic Technician. Your videos are a great supplement to what I have learned In school. Strengthening my Electrical Foundation. Thank you for sharing the knowledge. You sir have gained a subscriber.
Thank you for this video and all of the content you put out. The information is price less.
Very easy to follow and understand. You cleared up a lot of unknowns for me. Thanks.
the best intro for automotive electrical work and troubleshooting. hands down. excellent style. perfect reiteration of important points. i've been working with electrical systems in construction forever....and you nailed it.
Thank you!
This was massively useful, thank you!
Glad it helped you.
Thank you for the information
THANK YOU! Excellent explanation 👏
At 26:45 I was wondering how the alternator case (which should be grounded) could be "hot" at 11.5 volts with the DMM positive lead on it and the negative lead on the negative post of the battery - the answer is in video #84 in case anyone else had the same question...
The first thing that I tell someone before they ever pick-up a multimeter is that they need to understand OHMS law, so they understand the relationship between Voltage, Resistance and Amperage. If they do this and can at lease work, it through a series circuit it will help them with things like voltage drop.
That was great,ur gonna make me a great technician,Wayne, Stratford automotive tech student, straight from the trenches of Baltimore,but passionate about my studies,love ur video,the way u break things down, please keep them coming.
Glad you find them helpful! I wish you the best in your future career.
I had 2 yrs. of electronics many years ago, this was a great /practical refresher. And as a private pilot, you pose a valid analogy (only had 15hrs. of instrument trn). Thank you Sir! Great job! Down to earth (pun) humble, knowledgeable presentation. Now back to learning my Pico 4425.
Your simply the best out there Pete thanks so so much for the wealth of your experience, in showing others.I was doing a job today and had one of them where the heck am I here on the fix I was looking for and had one of them mental melt downs lol. (smiles) and for the life of me do you think I could get my thoughts back together did not happen as as my grandfather once told me Dave just walk away for a half hour and come back to it. But today I just said iam coming back tomorrow (Is my car) That said your video brought it right back to me in your couple of videos. Thanks Pete once again (always watch your videos I have learned all of my automotive,electrical through your channel ,I have never looked back and we are talking about quite a few years now (coming up dec 25th iLL BE CLIMBING ANOTHER YEAR (SMILES) YEAH HITTING THAT 61 MARK AND STILL PUSHING THROUGH. AWESOME VIDEOS LIKE USUAL PETE.
High Quality Teaching
Fantastic video!!! I for one, would love to see more videos of this nature. I hope you make this into a series.
Excellent presentation. Very clear and super informative. Even I grasped most of it. I'll watch it again (and again) and start testing a few circuits.
Excellent instruction. A great teacher.
Excellent video Pete. Very informative thanks.
Great instructor !
Very helpful presentation. Visually seeing how and where you placed the DMM leads helped. Thanks
thank you sir, you really have a perfect teaching style. engaging and very informative. appreciate this lesson!!
I watched many videos about voltage drop and just didn't get it. After watching this video, I finally get it. Thank you
This is an amazingly awesome lecture I have been listening to this video several times and I have convinced myself that I have the AH Ha moment now.
Such a well done video! Thanks!
What a great video! Thank you for sharing your knowledge. You seem like a great teacher.
Fantastic video, thank you!
Super informative, thanks so much!
This is phenomenal. Thanks.
Brilliant! Perfect! I feel inspired to go check my no start now!
Thanks for your great work, I really appreciate your efforts.
Absolutely excellent, thank you.
Brilliant video and explanation again,thanks Pete for taking the time to share👍👍
Great video.. love this sort of content.
Thank you so much for all the work that went in this video ! And for free ! Amazing
Can't thank you enough. This is going to help me diagnose a o2 sensor circuit problem
Great video. Thanks for sharing.
Thank you, that’s really informative.
thanks PETE watch a lot of these electrical videos as a refresher!
Great video! Thanks Pete!
Thank you for this great video. What's true yesterday is still true today.
Brilliant video. Thanks to The Trainer.
Hopefully you see this someday. What a great video. The nuanced detail in the explanation between testing methods at the end, ties together a concept in electrical troubleshooting overlooked by so many instructors. That is answering g that uh oh moment question when you get a reading and think ok now what
Thank you!
Nice refresher, thanks
Great video! Very easy to understand. I wanted to know the very basics of this subject and this video really helped. Thank you
Hello,
Glad you are sharing with us, thanks alot and be blessed.
Tigo
Thanks for sharing this video. It's very useful to have the basic knowledge.
Thanks for the great info!
Well done on a brilliant explication and thank you so much Sir. You are both a gentleman and a scholar!
Thanks i really needed a refresher on electrical circuits and you explained it very well.
Excellent presentation Pete. Very informative.
I Learned more from these Verily.Thank you so much Sir Pete
Awesome video, many thanks.....
Solid!
Much appreciated.
19:05 .....Taking its Share , Love the gestures
Excellent explanation. Thanks.
brilliant video. everything well explained
Excellent video - thank you
This is an absolute gem, thank you sir for this wonderful explanation.
Glad it was helpful!
Great teacher ☺️.. I have a p0420+ Dtc B1133 on a 2009 sx4 that's been plaguing me for months.. been to various garages whom all different diagnostics and prescriptions.. last week I realized the engine wasn't grounded!!! So my despite my inexperience in mechanics I'm taking matters into my own hands to try to find the issues before winter comes. I keep thinking the issue might be electric rather than mechanical since when I reset the battery+ecu the car runs great (for over 60kms) until I park it and restart. Very useful channel thank you 🤗
Great video. Helps me understand a lot better now.
Excellent tutorial.
I wasn't aware it was possible to see voltage on only one side of the circuit, or as you said: test between the battery positive and the load positive. It doesn't make sense to me, but I believe you. I'll have to try it out. Of course, this technique is as you say a dynamic test, opposite of a static continuity test which is how I'm used to doing it.
Excellent teaching,thanks a lot
Thank you kindly teacher 🙏
Will explain, thanks for sharing
I own a 05’ Duramax and had electrical issues and cost me over $15,000 due to these diesel shops not knowing enough about electrical diagnostics. Yes they knew all the basics but to find a shirt at exactly the right time is a true art or genius. A man that has mastered this is worth 200k a year easily and can ask for this salary and will get it as long as he can prove he is truly an electrical diagnostics expert. I have heard of one guy in Houston but I would be surprised if there are 50 in the US. They are that rare. It’s like this. Maoist mechanics can do any type of work to a car yet very few know true diagnostics once things get complicated. This is why finding a truly genius mechanic is a very good find
Solid instruction, Pete!
Great videos! Thanks a lot !
Wow! Awesome! Thank you
Another great learning experience
Awesome training 👏👏👏
nice info, helps a lot, thanks.
Thank you!
thanks Pete great as always
Phenomenal content!