How to Use a Multimeter to Diagnose Car and Truck Electrical Problems

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Its an electrical diagnostic tool every DIY mechanic should have. You all know by now that electronics are the backbone of modern cars. Every component ties in to the computer system! A multimeter is a basic tool to measure critical aspects of a digital electronic system: voltage, resistance, current. A small fluctuation in these parameters could wreak havoc on electronic vehicle systems! This video shows you the basics of using a multimeter to diagnose several common electrical problems in your vehicle.

Here are some things you can do with your multimeter!

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⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

[AAuto]

√ *Watch the Video*
√ *Do it Yourself*
√ *Save Money*

[Genetixxxxxxxxx]

Decent video. Felt a little rushed and incomplete. More detail while keeping it simple. Thank you for the video and all your efforts you have been a big help to a lot of people. Do not be discouraged we love your videos, keep them coming.❤

[cardo]

Good vid on using a tool that many are intimidated by.

[davidweum]

I tested my battery which showed perfect voltage. So, I figured I had a different electrical issue. I looked and looked and tested everything I could think of. It
was -30°F in Alberta for 10 days in January 2020. It turned out I needed the battery test you mentioned which told me my battery had two cells that were bad. I learn something everyday. But, I wish I'd known about the "true" battery function test. Until I took it to a battery shop I didn't know of this other, true battery test.
David
Alberta

[eunicemisedzi]

What l like most of you is the way u talk the way you take time, bless you good teacher

[johnmcgarry]

Got to say iv been trying to diagnose my fan in my car and for time now iv been struggling to find out how to use a multimeter and I think for any info out there about this subject your at the top for making things easy for the common man honestly thats off the to bro I'm away testing everything on my mini r53 as it's a old car and I hate paying to get stuff done I'm able to do with a little direction from old Google lol and people like you guys a1 auto grate stuff guys

[bsir]

Love this video that make me understand more about the usage of DVOM. An automotive student from Canada. 31-07-2023

[hawkology]

That's great. But what if the wire is hooked up in the car/truck??? Not just a wire laying A little helpful but definitely missed the mark. I'll find another video guess.

[MD-cyop]

Good explanation
Please upload about ignition coil ohm's and ampere.

[Baneslayer]

Great video, super helpful for me. Thanks!

[familyceo]

hey.. happy tosee you are stiil around making videos.. you rock.

[homeboy]

Auto electric for dummies...so grateful for these videos!

[vector]

When testing amperage draw (such as the fan motor example) doesn't the fan have to be running- actually drawing amps??

[LeIeI]

The one and only, your friend and mine, the Digital Multimeter.

[yeltsinrodriguez]

Thanks you guy are the best. Do you have a school program? that a great idea

[jg]

Should I get a voltmeter or multimeter as a beginner mechanic

[robert]

When testing auto parts does it matter which side you put the leeds on when testing continuity or volts?

[fwbggnx]

It would have been helpful if you could have put in some real life examples on when you would do each type of test say for instance if you're installing a stereo what test you may need to do at that time or trying to fix it 12-volt Outlet

[backyardbuilds]

Can u show how to test 3 or 4 pronged connector and sensor

[sniperpaintcorrection]

Can this be used to test connector plugs ? My coolant plug got wet and I wanna make sure it works probably after I dry it and plug it back into the sensor