BASIC AUTOMOTIVE ELECTRICAL DIAGNOSIS PART 1

Finally!! Had time to make the automotive how to video for basic electrical skills - AKA Rustbelt’s crash course on 12v electrical

Check out the extended cut on SP Tools USA YT page:

[joeandgod]

I find it easier to think of Ohm's law as a river: The voltage is the water, the resistance are all the rocks and boulders in the river and the amperage is how fast that river is flowing.

[aodhmacraynall]

Dude, this is great. This is what Youtube is about!

[christ]

As somebody who studied electricity in some detail as a physics student, I must say that this explanation is excellent. Clear, properly paced and sequenced, and everything explained through a single good analogy. Great work!

[prestondewhirst]

Hey man I’m a student at UTI and want to brush up on diag skills, do you think you could post a vid or 2 of a real world car with a real world problem and show the diag procedure start to finish? What they teach in school vs real world are 2 different planets

[jakeelizabethmeche]

ive watched and read many o forums and videos on these basics and you are the first one to make it make complete sense, thank you

[Thebigjosh]

I needed this thank you so much!! AWESOME JOB😎 !!!

[SinAnios]

16:22 I believe you meant to say .13 Amps instead of .13 Ohms. Nevertheless, this video is more informative than an entire semester of college. Great job!

[nickayivor]

What do you call KNOWLEDGEABLE and SUBSTANTIAL the answer is
Rustbelt Mechanic
I just ❤️ when you do electrical diagnosis. Thank you again tutorial 👍 👌 👍 👍 Take care and have a great day
Rustbelt Mechanic
From Nick Ayivor from London England UK 🇬🇧

[brianstewart]

I want to thank you so much for making this video and making it more understandable and comprehendable. I've worked in the Automotive repair field for all of my life but automotive electrical has always been one of my weakness and now after this video I believe I have a much better understanding of the electrical system

[robertward]

Your a great teacher, I'm glad I found your blog....Kuto's to you sir and thank you for taking the time to teach

[automosikat]

Thank you so much sir.very clearly and knowledgeable your tutorial.

[javierjimenez]

The best video I have watched about auto electronics Thank you you’re great instructor

[angelnegron]

Great video. My teacher taught me this way 👍

[nickayivor]

Good Afternoon Rustbelt Mechanic take care and have a great day 👍
Great tutorial thank you 👍
From Nick Ayivor from London England UK 🇬🇧

[Tricky-cblq]

12v/.13a is 92.3 ohms. You still have the light bulb in there causing the extra resistance in your circuit.

[rpruneau]

Good video overall with a technical error measuring amperage and very important concept many new techs wont understand.
I recall SAS; where Series circuit Amperage remains the Same throughout which is what you are representing on the breadboard trainer. Regardless where you measure your electrical flow it will ALWAYS read 0.13amps.
Ohms Law states V=IR and R = V/I therefore; R = 12v/0.13A or 92ohms across both resisters since it is in Series they add together as a single resistance. By deduction, if the 1st resister (V1) is 39 ohms then the light bulb (Vb) is 53 ohms.
With these known you can calculate the voltage drop across each resistance as V1 = 39 ohms * 0.13A = 5.07Vd1 & Vb = 53 ohms * 0.13A = 6.89Vdb. Now to confirm series circuit voltage drop across each resistor is equal to source voltage so V = Vd1 + Vdb = 5.07 + 6.89 = 12V.
That is why your meter was reading close to 7 Volts when measuring across the bulb once the 40 ohm resister was placed into circuit.

[slnhmb]

Am new starter it was very usefull thanks much!

[hemantdaulta]

You're a badass bro! Thank you so much!

[southhillfarm]

Great, great video. The most important part of diagnostics. I'm a shadetree mechanic and I see this as teh most important part of automotive work.

[excessivethrottle]

The guy makes it look so easy! Wanna come fix this PTO control module on a Silverado 😂 the thing is fucked I started chasing the wires and still nothing sticks out 😭 so frustrating hate electrical 😤