Electrical Troubleshooting Basics Part 2 -EricTheCarGuy

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Electrical Troubleshooting Basics Part 2 -EricTheCarGuy
Visit me at: www.ericthecarguy.com/
This one is not really a part 2 so much as a continuation of how to go about solving electrical problems on your vehicle. I try to follow a simple formula when confronted with electrical problems that way I have a plan which will increases my chances of success. Step one, check all the fuses. Step 2 find a wiring diagram and learn how the circuit works. Step 3 develop a plan for testing. Step 4 test and prove out the theory. Step 5 repair the problem. Step 6 verify the repair. Those steps have gotten me through quite a few electrical issues and I hope they help you too. Here are some links to other videos you might find useful.
Relays
• How To Test Relays- Er...
Electrical troubleshooting part 1
• Electrical Troubleshoo...
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Click below and Stay Dirty
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Stay dirty
ETCG
Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy 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 EricTheCarGuy, 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 EricTheCarGuy.

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23 сен 2012

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Комментарии : 199

@uzaiyaro 11 лет назад

Wow, that's one of the best fuse boxes I've ever seen. So neat and well laid out.

@Acuransx135 11 лет назад

Your electrical videos are always my top pic for when I have an electrical issue. I know how to wire a circuit but if I have an issue I'm lost unless I watch one of your videos then I figure it out. Thanks Eric

@MrJalafanakis 8 лет назад

I actually had a physical and verbal reaction when he stuck his finger near the condenser fan. I shouted "Get your finger out of there, Eric!" and I laughed at myself uncontrollably :D Thanks for the entertainment, Eric, you daredevil.

@margolo 11 лет назад

Why am I watching you? Because I don't like how Scotty Kilmer yells at me :( Seriously though, you explain things so well.

@ItsKing32 Год назад

😂😂

@nelmel0520 11 лет назад

This guy is awesome! He deserves a hell of alot more than what he's currently getting! Best videos around (PERIOD)!!

@philtolfreeart 3 года назад

You're the man Eric. Wiring problems with my '94 Metro brought me to you once more!

@dummkompf 4 года назад

TY over the past couple days I've been trying to learn how to read audi wiring diagrams and come up with a way of figuring out why my fuel pump relay isn't getting power... I suspect the ECM but wanted to be 100% sure before replacing it. Just last night as I was laying in bed I came up with the idea to test the 4 inputs to the relay and then the wire going from there to the ecm... exactly what you described in this video. Even though I already thought about doing this, it's definitely helpful to see it laid out on video and to have verification that it's a good diagnostic method

@sabergermd 8 лет назад

Good two part series! Learning auto electric is like learning a new language. It makes my head hurt.

@yoyoraaz 11 лет назад

Eric your videos are totally awesome and a great help for me fixing my old Mercedes. I learn so much. You rock!

@maggiealena 4 года назад

It love what I do. I'm a hospice home health aid. I get such a thrill when I see others passionate about the careers they have, its really exciting. Do what you love to do, that you would do for free if you could just to be doing what you love. That you for your videos. Your a good role model

@donovanmitchell4177 6 лет назад

I believe that you are a great Auto-Technecian. I do enjoy your repair performance. Especially the electrical diagnostics- Tumbs up!!!!!

@ohjason8 11 лет назад

You are very good at taking the viewer/DIY thru every step with pics. Invaluable! Then at video you did "double check". Great.

@younglife88 10 лет назад

i love your videos. Appreciate all your time Eric!

@cehuddl 3 года назад

Great video on a real life problem. I subscribe because you take the time to explain and visually show each step. Keep up great work.

@MrBillytwice 8 лет назад

I like wiregram. it's an abbreviation that makes sense.

@AlchemistLair 11 лет назад

Very thorough electrical diagnosis video!! Really lays it out clear.

@blaise2fresh 3 года назад

It’s so easy to learn from your videos. Thank you so much!

@sherryphipps4017 2 года назад

Eric I like watching your videos I learn a lot

@sylvias8879 3 года назад

Very good! Just a tip about radiator fans ; if one hasnt been working for a while and you jump the circuit to make it work then make sure to check there is no debris in and around the fan first. You dont want a missle flying out.

@Viper81766 9 месяцев назад

No doubt 💯

@phillipmurray5516 4 года назад

Love his videos, always helpful.

@davidostring7627 5 лет назад

Thank you for sharing your knowledge. You are an inspiration to the d.i.y'rs.

@JasonSmith-qx3zh 6 лет назад

Man part 1 help me fix mine that was so kool to take what you say and execute for a complete repair thanks a million Big E. u r da man.

@henrytripp6334 7 лет назад

Great troubleshooting video, Thanks for sharing this with us.....

@johneric3886 3 года назад

Nice work Eric I always appreciate your videos.

@checkenginelover 9 лет назад

I ll like to se more about HVAC videos!!!! BLEND DOOR ACTUATORS ...PRESSURE SWITCH!!!HOW TO TEST OHMS IN A COMPRESSOR STRAIGHT OF RELAY BOX.......I REALLY FEEL GLAD TO SEE GUYS LIKE YOU TRYING TO ANSWER PEOPLE QUESTIONS.....THANK U .....N GOD BLESS U BUSINESS AND U FAMILY..............................AND I'm sorry 4 My bad English but i'm still learning ...

@jahdaim9360 7 лет назад

Wow Eric ur awesome.. this video really was exciting and helped out a lot..

@alohadotmorgan 11 лет назад

Very good vid, Eric. I'm not sure what clue I missed regarding the high/low amp switch and why you thought it was ok, but personally, seeing the burn in that area, I would have focused my attention on that unit and it's socket.

@yuribrandi8212 8 лет назад

You should also list causes for failure of relays etc. Like the fan you were talking about, yeah my fan didn't come on, but it was obviously the relay. BUT checking the amperage drawn/ohms shown, the fan was trying to pull to much power. So that's always something you check assuming its powering something such as a fan,a/c clutch etc. If its drawing to much amperage through it, or its got to much resistance it could be in need of a new part and a relay, or just a relay, assuming the amps / ohms are in check for the given piece you are diagnosing . But remember kids, if the resistance or amperage demand is to high for the relay,.. it'll fail another relay or control module. Never diagnose why something does't work, diagnose why it failed in the first place.

@MrBertgroves 7 лет назад

Your pretty good at explaining things to us dummies👍🏽 thank u

@ohjason8 11 лет назад

Some of the BEST DIY videos I have ever seen!. Bar None!

@ruanrocha3093 4 года назад

nice video man, i really enjoyed it. one of my favorite channels

@mohayedeltayeb5105 3 года назад

Great work, Thank you very much .your videos taught me a lot .

@Anjiru0009 11 лет назад

Another awesome video, keep up the great work.

@Gixx3rman 11 лет назад

Thx ericthecarguy ...!!! i'm doing my mechanics licence .. and your video's always help me out !!! but can you do a video on the voltages and currents and how to repair a Delco remy st10 starter ??

@justinevirtue1755 8 лет назад

Thanks Eric. Your videos are great for a newbie like me. I read somewhere that wiring diagrams on conversion vans are next to impossible to find. My van is an 93 E150 Cargo with an RV prep package (I think), converted by a company that's long out of business. After the passenger conversion, a wheelchair lift was added, then removed by the folks I bought it from. They added a bed and did some interior work to create a basic sleeping area for touring the US in comfort but nothing else electrically. I'm hoping that there are basically common electrical modifications to conversion vans that follow the original wiring in a logical way and really hoping conversion companies didn't get too creative and out there with the wiring. Does that mean that collecting wiring diagrams from similar conversions might be worth while starting with the factory specs?

@figibloom 10 лет назад

Nice video. I noticed you swapped fan control modules out to test which worked fine. However, I was looking at the drawing and I was wondering if you could test the module by disconnecting it and bypassing it by jumping the blu/org to blk in the fan module connector. If it comes on then you have a bad module. I was just wondering if that might work. Well thanks for the video and explanation. Great job as always.

@deltafour1212 8 лет назад

I'm "stealing" your stick pin idea to troubleshoot in my HVAC job . FANTASTIC IDEA!

@charlesyoung4744 4 года назад

great video and instructions as usual thanks

@johnschutt9187 5 лет назад

Great work. Thanks.

@davide30541 11 лет назад

simple straightforward video. :) lovely.

@Sketch1994 11 лет назад

Your responsibility is to inform the client and ask.I've seen many people that are like "get it unfixed" or "who told you to do so?" and then a ridiculous situtation much worse than the problem occurs and every other job is delayed for shit.

@JasonLeonPike 11 лет назад

Thanks man - you are extremely helpful.

@jamesdoherty2614 2 года назад

Great Video Eric. Would you consider doing one on Parasitic battery drain problem. Thanks.

@josecruzyanez 11 лет назад

YES! This vid is exactly what i need!

@atraxr603 8 лет назад

OMG that shield for ECU, it's like Spartacus mounted his shield there.

@KeenanTims 11 лет назад

it's worth having a look for broken solder joints (or just reflow the whole board, they're not always obvious on inspection) before giving up and replacing it. had a similar intermittent problem with the door locks on my accord, turned out to be a broken solder joint in the control module. cheap and easy fix - after an hour diagnosing on my electronics bench because the broken joint wasn't visible :P

@biffbiffle 5 лет назад

great video, thanks!

@checkenginelover 9 лет назад

And THANK YOU FOR ETCG1.......SIMPLY YOU ARE THE NUMBER #1....

@clarencecherrone7914 8 лет назад

Would also be nice to know how many amps the fans are drawing. Well done sir, I like having the definite answer as well; that is what separates mechanics from parts changers. No boomerang vehicles, fix them once and fix them right is the goal.

@ashthebartender 11 лет назад

this is why i love viscous fans. great vid!!

@MechanicalMikesRoadsideRepair 4 года назад

I watched just about everyone of your videos before I went to tech school and now I've got more experience and learned more I'm back watching some videos again to pick up more and missed info, this is definitely helpful. Obviously now electrical diagnosing is super important on new cars

@billrok 11 лет назад

Eric, you should be teaching the next generation of tech's at the local college! Nice work.

@JesusRamirez-ho2oe 8 лет назад

Goog explained the wiring diagrams but the problem i think it was the fanmotor brushes you tap on the motor they start working again nice video

@cesarpereira5965 3 года назад

Good video Mr. Eric 👍

@rideordieguy1 2 года назад

Sweet video. Thanks.

@HollowPointBullet1 9 лет назад

Lol at 12:20 "I basically prefer to back probe"

@pordzio 10 лет назад

If that happens whe you ride over a bump or something like this, then check the speaker wiring. I have met many radios, that shut off the amplifiers if the output is shorted (either the wires can be shorted between themselves or to ground)

@mrbl665 11 лет назад

Always dirty always will be. understood everything you said !! I got a 22r engine I'm rebuilding. to bad your from Cincinatti ") I can ake the video and edit. your two+four+six sense and knowledge might be helpful to others !!! Thanks alot for your time I hope to do the same in the future !!!!

@Jaiclickclik 5 лет назад

Ilike the videos thanks. Could you have done a voltage drop test ? If so how. Could you have use a to eliminate the control module

@cbobcbob100 11 лет назад

Thanks....great job

@AutoAndRepair 11 лет назад

Glad I wasn't the only one in the grey area. I was wondering the same thing, I think in the end he replaced the control unit and that because it was the old control unit that was intermittent. Probably a solder connection that did not contact when the control unit got hot.

@A589C 11 лет назад

I love your videos!

@ringbolt9 11 лет назад

great info

@REPOOCNITSUJ 10 лет назад

Love the video, and was wondering if you could do a video on color coding wiring diagrams like you did on this video? Maybe a step by step? I have a terrible time reading wiring diagrams and i think that would help me a ton!! Stay dirty my friend-

@sam111880 9 лет назад

even troubleshooting a sensor or actuator is possible with a standard DMM and knowing its resistance range and even so odb2 scan tools can hook directly to sensors and actuators so the only components I would have trouble diagnosing right now is the control modules that don't throw codes

@JoeFpoc 11 лет назад

step 7 if all else fails run your own wire and a toggle switch:) but seriously good video. i hate electrical issues.

@renragged 11 лет назад

At 1:32 when Eric dropped the relay I tried to catch it... I need my coffee...

@sam111880 9 лет назад

I watch you because you know a lot of stuff and you rock. And I am wondering about if there is an all in one website that allows one to type in make and model of a car and out pops a pdf of the wiring diagram for the car and its features , power seats , flashers ,....everything in one centralized location. so one doesn't have to download a million different manuals for wire diagrams for each make/model

@visualvirtue9640 11 лет назад

I didn't understand fully but enjoyed the vid and enthusiastic lesson.

@sam111880 9 лет назад

yes the colored wires are demystified by the wired diagram, one can trouble shoot for relays , fuses , motors , and open /shorts in circuits or there connectors. But how do you know if the control modules are bad I would think the odb2 is the only way but will the odb2 diagnostic tool always throw a code for a bad controlling module? like a fan subcontrol module I know most of the major ones like ecm, bcm, tcm ,...etc would probably throw a code but for subsystem controls

@papackar 6 лет назад

Thanks for your vids, EricTheCarGuy. They are informative and interesting. I do detect a teeny touch of stefan molyneux in your manner however, which will hopefully fade away as the real you shines forth.

@mlb0611 11 лет назад

Power Probe is not owned by snapon it may be sold, by them as well as Matco etc, but they are a company all by themselves, they also have the best brake bleeder and adapters on the market. PP 3 is the best there is! I was just using mine to diag a inop brake light:)

@Davidl91 11 лет назад

love your videos eric as a mechanic by trade its always useful to learn new things, i think you need to get more sleep tho as you look half asleep in this video lol

@robertk1129 8 лет назад

Great channel ...I like Eric because much like me he's old-school and I will never depend on the ODB scan to Indicate a problem sometimes it's an easy problem that can still throw a code like a misfire code on the Chevy's most times it's a bad wire and I have fixed tons after people have spent Huge $$ on converters and sensors that was just unnecessary and all it needed was cut splice and solder a wire... so keep you hair in your head not in your hands and check all the simple symptoms First stay clean....

@Soulcommander 6 лет назад

A question no ones seems to be able to answer for me. I need to replace the power distribution center (fuse box) under the hood. The horn does not work and a mechanic determined this needs replaced. The box is expensive so I found a cheaper one and want to do it myself. So the question is people have said it will need programed. But will it? This is a 2007 sxt dodge caravan. Any info you can toss my way?

@RobertMOdell 7 лет назад

So how did you determine the relay was working fine? Especially with the burned connectors and the continuity check reasonable.

@ah77ed 11 лет назад

thank you very much from egypt

@tarugo1851 4 года назад

im a student and your vids helps me a lot... is there any way you could test that control unit? or any unit at all? if you can, can you make a video of it tnx

@mavisbee4960 6 лет назад

Hey Eric, Which wiring diagram source would you recommend for Infiniti? I've heard you mention a few different ones but from what I understand, you have to pay to use them, so I am not sure which one would be best for my kind of car.

@Micscience 11 лет назад

good stuff

@voltare2amstereo 11 лет назад

burned connectors means high resistance caused by poor fit, loose spades, or excess current draw possibly caused by a worn fan bearing.

@wendywhales2310 5 лет назад

Hi Eric, The power going to the fan relay,does it require full 12v load orcan it be reduced.?. My fan isn't working,But, When I put the TEST LIGHT n to connector it glows as if with reduced power,in other words it seems DIMMER,What could cause this phenomenum.? Thank You.

@edgarmonzon1188 3 года назад

Man ur so good. Thanks for the help

@elchick8328 5 лет назад

So what if the wire had been the culprit instead of the unit you replaced? Do you just run another wire along side the wire loom to bypass the faulty one? How would you go about repairing an issue like that?

@peterfrancis3865 3 года назад

You did well thanx

@MLGTruckDriver 11 лет назад

Not alone. I have saved alot of time troubleshooting using a diagram.

@davidweum 2 года назад

I cannot tell if my coolant fan works because I'm told it only works when engine is running under the hood unbeknownst to me. Same as possible trunk light and relay circuts. I'm a DYI'er and its all too complex for me and I do not have the expensive equipment you have - screen and all. I'll take it apart, of course, and do my own DYI diagnosis...then take it into the garage to get fixed for $300 - $600 fix on my car I got for nothing$. It breaks my heart. But, not before I remove neg cable for awhile until I get my "isolation switch".

@darkmagician1184 4 года назад

What is that unit called? I believe that is the issue I'm having my with accord where the fans will turn on immediately after the car is turned off, regardless if the car has run (i.e. cold engine); fans also don't run unless the A/C relay is engaged. I've replaced the relays and thermoswitches, so last resort, but having a hard time finding this part online. Closest junkyard is 50 miles away, but push come to shove, I'll drive it. nvm, found some on ebay using the part number from the honda diagram. thanks for the video

@babynugent 11 лет назад

THANK YOU, and perfect timing, my A/C just went out.

@psicopatalucifer 11 лет назад

cool Eric.!!

@StewartJones 2 года назад

Thanks!

@mubirukadiri6611 7 лет назад

Thanks good video, but how do you get the wirelling diagram?

@MrNeonDriver 11 лет назад

Broken solder joints are a known issue on japanese cars here were you can easily fix the problem with resoldering the broken solder terminals. You can notice it by looking at the solder joints and find a small ring in solder.

@pugman205 11 лет назад

I did not mean in this particular case with this particular manufacturer, but in general. Ok it stands to reason that if this is a common problem, then an alternative new part would be the best option.

@salceti 11 лет назад

Eric awesome video. Have an intermittent problem with an 05 Honda Accrd. The radio will all of a sudden cut out but the display is still reading as if all is good. No sound but if i turn the system off then back on it usually comes back to norm. don't know if it is the speaker wiring or the radio electronics that is the problem. Any suggestions? Cd player also does not respond but display says it is playing. Will usually be alright at first drive of the day, then it will die after a few minutes

@AlwaysHopeful87 11 лет назад

Thanks.

@johnmckamy6398 7 лет назад

if the module is providing a ground , could you just hook a test light to battery positive and check it at the relay connector ? or would that be risky to the module?

@MisterMattyMo 11 лет назад

Did you ever fix the connections in the relay box? Just curious

@cuevasedward 5 лет назад

I have a 97 accord lx my fans don’t turn on while driving but once I shut the car off they turn on. I jumped the thermostat switch and both the ac and cooling fan turn on , I replaced all coolant sensors and relays and fuses except for that box u mention in this video does my 97 accord have this “fan timer relay”

@pugman205 11 лет назад

Hi Eric, I noted in your video that you used a part from a scrap car that came into your garage. However what is your opinion on generaly using second hand parts instead of new ones? I mean especially when older cars, their parts are harder to get hold of or third party parts are inferrior in quality.