How To Test Relays- EricTheCarGuy

Рет қаралды 1,639,868

12 жыл бұрын

How To Test Relays- EricTheCarGuy
How to test relays is a video about just what it says. Every once in a while you need to test a relay and when you do it's important to check it thoroughly, if not you may think it's good and it's not, just because it 'clicks' doesn't mean it's good because that's only part of the equation. Yes you can swap it out with a known good relay and that will save you time but if you don't have a known good then this test should do the trick for you. This video is also a good way to get to know what's inside a relay and how it works so if you're curious about that this would be a good video to watch.
If you want to see a video on basic electrical diagnosis click here.
• Electrical Troubleshoo...
Visit me at: www.ericthecarguy.com/
---
Click below and Stay Dirty
Visit me at EricTheCarGuy.com
ericthecarguy.com/
Visit EricTheCarGuy Forum
www.ericthecarguy.com/forum/de...
Visit my Facebook Page:
/ ericthecarguy
---
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.

Пікірлер: 645

@SuperBIGGUY49 9 жыл бұрын

Im 21, I have 5 ASE's and work in a independent repair shop. I watch your videos in my free time trying to learn all i can. You really have helped me in the real world diagnosing problems and understanding systems. thanks for the videos you make!! it has made me a better technician!

@Absalon2085 9 жыл бұрын

I would also recommend you to check south main auto repair channel. Lots of good stuff there, good luck in the automotive world.

@drakkarind3767 8 жыл бұрын

Eric, thank you so much for a simple, yet comprehensive instruction on how to test one of these stupid things. I gotta say, your videos are some of the best. Unlike so many of the other instructional videos on youtube, you do not ramble about this, that or the other thing. You don't offer superfluous information about the job. you are direct and to the point.

@mike780808 9 жыл бұрын

Thanks Eric, you, as always, explain things in a simplifed, "dumbed down" (Thank God) manner that I find very helpful and informative. Please keep it up!

@93coupes26 7 жыл бұрын

eric please do not ever retire .you make the best vids you explain everything in detail

@sergiogobniskeb3718 5 жыл бұрын

Eric you are an excellent car repair instructor. I have learned so much watching your videos. God Bless..!!!

@SantanaLG 11 жыл бұрын

EricTheCarGuy, I want to say thanks to this videos I was able to fix my car. My car was having a no spark because of bad ASD relay. Your process of testing relay is simple and effective. This video help me identify a bad relay that prevent my car from starting. Once again thanks:)

@fourustwentius 8 жыл бұрын

You're awesome man! I have used the info you have provided to fix electrical problems. I also sincerely respect your "fixing it forward". Keep up the good work and God bless!

@francislegac7316 7 жыл бұрын

Thanks! You saved me $20 and a trip to NAPA. Still don't have taillights on my POS 2002 Dodge 1500, but the relay checked out fine.

@darrenfozziefoskett4211 8 жыл бұрын

Thanx Eric TheCarGuy and Aaron Houk (couple comments below) Fixed the ole ladies car in less than 4 hours. That includes watching this and a few different vids, WALKING to the Hardware store, grabbing a Gerry can of fuel, changing the batteries in my flash light, a quick jaunt to the beer store, a conference with the neighbourhood guys (who saw a hood up and were drawn like flies to shit.... they didn't help, but drank my beer), and lastly actually doing the repairs. I'm a hero for less than an hour actual work. Keep up the great work.

@electricaljunky 9 жыл бұрын

Great video Eric! Thanks for sharing! This is great for individuals learning how to check/test relays.

@robertbaumann960 2 жыл бұрын

Yo Eric the car guy, Thank you for your channel and the education I and others received on relays!!!! Means a lot to people like me who need to repair their vehicles. God bless you for that!!!

@jonnyboat2 3 жыл бұрын

This is the best video I have ever seen to clearly and effectively explain how a relay works and how to test it.

@mp-wq2su 5 жыл бұрын

Awesome Eric! Unfortunately I cannot do much of the sophisticated complicated heavy duty auto work anymore because I'm disabled with (MS). Your tips on at least me doing surface issues are definitely fulfilling! For the other issues at least good knowledge, when and if I need to take my car to a shop at least gives me money savings heads up on making sure I'm not going to get scammed, thank you so much!

@wtorres562 4 жыл бұрын

I'm really impressed with the way you teach cause it gave us different alternatives to deal every step. And that's the best way. Keep the good work. Thank you.

@sebastiankane5774 4 жыл бұрын

thanks eric, your instructions were clear and concise and helped me diag a relay quickly.

@gabrielellis6137 4 жыл бұрын

Helped me diagnose my ac relay today. I appreciate your videos. Thank you

@mysticsadist6701 9 жыл бұрын

This helped me to test my Air Conditioner's relay. Thanks!

@youngseanconnery8577 4 жыл бұрын

You have saved people countless dollars with your well-done videos. Thank you Sir!

@davidturner2113 5 жыл бұрын

I followed you directions on how to check if there is a draw on a car battery. I purchased a digital multimeter and hooked it up like you said. I found there is a 1.42 amp draw on the system. Now I am going to go through the fuses like you said. I never even knew about relays before. Very interesting.

@michaeljohn8905 6 жыл бұрын

Thanks for posting Eric. Another highly informative video, it been helping me in my school .. you are the dude! 👍

@eloctocs13 12 жыл бұрын

Thanks Eric. I just changed a bad relay for a buddies cooling fan and tested by swapping with another relay. I get home and you have this new video up. Perfect timing I did wonder how they work. Thanks again for you information. You really do help

@jk-ol3zk 4 жыл бұрын

Well done! Detailed, easy to understand. Much appreciated!

@basiloahu4968 5 жыл бұрын

All your videos are so helpful and informative. Thank you!

@brucecuster5403 7 жыл бұрын

Thanks Eric, good explanation of what a relay does, how a relay works and simple testing techniques.

@erikborgersen 9 жыл бұрын

Eric, U da man. Incredible channel...thanksa lot for sharing knowledge ! Big hug from Norway / Erik

@asmaparvez7765 3 жыл бұрын

Thank you for the demonstration of how to test your relays. Very helpful.

@stigonutube 11 жыл бұрын

Thanks Eric, i looked at a few other relay test vid but none was as good and clear as yours, THANKS CHAMP, once again you have helped me out.

@jharris280zx 12 жыл бұрын

thanks for the video, i'm glad to see that our voices are being heard and responded to. keep up the good work, i can't wait to see what i can learn next.

@ImYourPixie1 5 жыл бұрын

Thanks for the thorough explanation! I appreciate that you give an explanation on how the relays work. It's nice to have background info on the component rather than just how to test it. Thanks so much!! 😁😁

@dciencemat2399 9 жыл бұрын

That's so much for your help Im having trouble with cooling fan relays, I will try your suggestion on test my relays .

@jkjerome1 9 жыл бұрын

This was a great guide for me. I didn't have a probe and wanted to do it inside so to activate the first circuit I used 3 D batteries end to end with an alligator clip sellotaped to either end. Then just used the continuity setting on the multimeter to get a reading. Was re-assuring given my weird car problem. On a VW 109 relay it wasn't so straight forward which pins did what so there was a bit of trial and error till I worked it out. The diagram on the side wasn't helpful either(to an electronics like me anyway!). But I know I got the right ones in the end cos I tested the bejesus out of it. And I could see the metal switch go on and off and hear the continuity go on and off accordingly. Christ this is turning into a confession... Anyway thank you for the guide Sir. You're a gent.

@josephhaegan7761 9 жыл бұрын

Great explanation on relay testing. I needed this

@michelangelosworld4401 Жыл бұрын

I like to listen people they know their trade really well. I learned something good today. Thanks!

@jaysonyandoc6712 7 жыл бұрын

just like to ask if there is a relay connected on the idle up of the aircon? same car toyota gli

@carlossgotti 9 жыл бұрын

Thanks for all your videos Eric !! you are the real deal !!

@doctorroca66 5 жыл бұрын

Hey Eric, back at your channel looking for answers. Thanks for the video.

@2tallB 5 жыл бұрын

This was perfect for DIYer. I have relays on an e-fan that had corroded prongs, cleaned those and it worked but now occasionally intermittent and I was wondering how to test the relays.

@jake30966 8 жыл бұрын

Thanks for help , 2 relays were replaced and solved the not starting problem

@joc1394 12 жыл бұрын

As an electrical engineer who happens to really like car stuff...I approve! Great video! As long as you know some basics like this, electricity isn't all that bad. Like you said in your last video, it works a lot like water.

@hibob 8 жыл бұрын

Great explanation of how a relay works & what it does.

@raymondclass6794 10 жыл бұрын

This was very helpful in understanding hvac relays

@carlosdavid4130 2 жыл бұрын

Thank you so much Eric, this was extremely helpful !!! God Bless!!!

@Dabz2084 12 жыл бұрын

great video on relay...plain straight and simple to understand...keep 'em comin', eric...kudos!!!!!

@1506pinkers 4 жыл бұрын

I now understand! Thanks for this very clear and helpful video.

@ShawnHennesseystuff 3 жыл бұрын

Dude, your videos are awesome! Thank you for doing this.. Currently doing a project 2002 Toyota Celica GT that's got some electrical issues.

@kiros13 8 жыл бұрын

I appreciate the useful information of your videos, thanks

@americanhindi 5 жыл бұрын

Very good video. Years later it is still teaching people. Thanks!

@brittanyragsdale5451 7 жыл бұрын

very detailed thanks Eric I appreciate your time

@ariesr4883 5 жыл бұрын

I'm stumped. 03 Rsx. My relays are buzzing. Condenser, radiator, and I believe is another relay that controls both condenser & radiator fans. Both fans work and fan switch works. I bypass the fan switch and the relays buzz crazy(fans not working). I also tried to turn on AC and does the same thing (with the fan switch connected). I heard the ac pressure switch might be connected to the fans somehow. Idk:( Big fan of your channel. Keep up the great work Eric!!!

@TheTheEnixero 9 жыл бұрын

Eric, thanks again....made test leads and tested the glow plug relay, which is working. Still no glow plugs though. Checked fuses, but have read about a thermistor or timer relay on glow plugs? Possibly a hidden fuse somewhere as tachometer not working also. Your videos are the best..greetings from Spain

@SuperRamon77777 6 жыл бұрын

Hey Eric thanks for videos ⚽🤘😁 I was wondering what kind of info/videos you got on lighting control module for 96 Continental??? And also on 2000 Audi a6 quatro 2.7t

@Jenks_Official 4 жыл бұрын

Dude! First video I saw of yours. Incredibly helpful! Thanks a million!

@P1cwh0r3 12 жыл бұрын

Very clear description and visual demonstration on how they work. Cheers!

@illegalmexicanssuck 11 жыл бұрын

Thank you Eric for making a great and educational video.

@Tomsjamb 11 жыл бұрын

Great Job Eric thanx for sharing most people do not understand the resistance is in the high powered contact from multiple uses they get a carbon build up from being and burnt from normal use.

@JackStrangelove 8 жыл бұрын

Thanks man. I always learn alot from your videos

@davidstock2713 2 жыл бұрын

Received 0.02 milliamps within parasitic engine off DC voltage draw, thanks to Eric. He isn't a gimmick, Eric has extraordinary experience.

@billywilson1954 10 жыл бұрын

I have had switches relays and even fuses that close and show continuity but wont handle the amp load. There is a volt drop test for that. I do like this guys videos. I've watched a bunch of them. I really like finding top dead center with my vacuum/pressure gauge. Thanks Eric

@iKingCold 10 жыл бұрын

I LOVE YOU ERIC!! YOU SERIOUSLY SAVED ME TONS OF MONEY AND TIME!!!

@prayfortruejustice 12 жыл бұрын

Great video. Thanks Eric. One other issue you might cover regarding relays in older automobiles is the solder points. For example: older Acuras and and Hondas can have an intermittent relay problem (probably other makes as well), where the car wont start when raining or in the morning when its cold, or if there is dew because the relay solder points are "micro" cracked. The relay may pass the bench test in a heated garage, but wont pass if damp. Google: "How to solder and fix the Main Relay."

@Noeman2009 8 жыл бұрын

Awesome..Clear and concise explanation. Thanks :)

@truckatone1 11 жыл бұрын

brilliant and imformative videos eric , keep them comming , you the man dude

@shermz01 4 жыл бұрын

This video is very informative, on problem solving my failed signal light and hazards with the front yellow lights still on, but didn't flash; on my 2006 Toyota corolla. Still needs fixing, waiting on new signal switch to deliver hoping it will solve the problem. I don't hear the clicking and I've replaced the relay already.

@user-sv5fd7pd3t 5 жыл бұрын

Thanks! Could I use any relay in my fuse box that is exactly the same but different color? Does it matter??

@Axuise 11 жыл бұрын

Awesome thanks! i have an old voltmeter (sunpro) doesn't make any sounds when touched and only has certain settings. when u said checking for ohms i believe i heard i then matched to which it was on my voltmeter. have an 82 e21 320i bmw tthat has a few things not working after checking fuses and checking wires. so now on to the relays. love how you shown how it works and talk about how and why. Awesome vid man! helped me out greatly

@salisane 10 жыл бұрын

Thanks for the great tutorial. I have saved so many $$$$ because of this video. May God bless you and God bless you tube.

@luckydog9500 10 жыл бұрын

I had no tail lights on my 2009 Chevy Van 40,000 miles. I had brake lights. I could not find the problem. The fuse box for tail lights is under the drivers seat. I am a good mechanic but this had me stumped. It was low milage and all stock factory wiring. I took it to the dealer and the mechanic there was young. I was skeptical but he found the problem in about 1 hour. I was impressed. He found the problem in a very creative way. He could hear the relay clicking but no power. He then noticed that the OTHER RELAY in that box under the drivers seat, had the same part number so he switched them and bingo problem solved! Victory Cheverolet in Petaluma, Ca.

@salazam 10 жыл бұрын

lol, it took an hour to swap a relay?

@luckydog9500 10 жыл бұрын

salazam The mechanic had to find the problem first.

@808ekm 9 жыл бұрын

Hey Lucky Dog, I have the same problem with my van. No Tail lights and reverse lights but brakes and turn signals work fine. How did you or did you get the problem fixed? Thanks if you could steer me in the right direction.

@luckydog9500 9 жыл бұрын

Ernest Makainai Relay under the front seat, There are two relays, and on my 2009 they are both the same part no.

@luckydog9500 9 жыл бұрын

Lucky Dog That relay malfunctioned at 40,000 miles! Not very good. I have no extra lights and was not using a trailer.

@defons1234 9 жыл бұрын

great video eric,very infomative,good teacher too

@zeroquanta6130 8 жыл бұрын

THANK YOU VERY MUCH. My jeep has intermittent starting and right now I have tried it several times and it will NOT start. So, I tested the relay, like you said and it did click but I couldn't get it to click again (It has 3 small studs), so I just thought I Killed it. But I put it in and it worked great. Sooo I'm pretty sure the contacts must be going bad so I will get another relay. I HATE buying things and find out that it was not the problem (I'm Not sure if there could be LOW voltage going to the relay bit I'm happy now). Fist up, Fight for Truth. PS. I hate My 2004 JGC Limited.

@LesSummer 7 жыл бұрын

Love your stuff Eric the Car Guy!

@alexp6012 4 жыл бұрын

Your explanations are perfect.

@jonathanantunez1175 8 жыл бұрын

Hello ERIC! Just a quick thing that came to mind while watching this video that might help others! Using double ended alligator clips and attach them to the DVOM leads and the other end of the clips to the relay ! Have a good one

@ramasamykannan9179 8 жыл бұрын

Awesome Eric !!! Knowledgeable and Wonderful you are !!! Keep it up Friend !!!

@ace7912 11 жыл бұрын

thanks a lot for showing the closeup of the relay, really hammers home the concept

@romellyarde907 11 жыл бұрын

it was an excellent video, explanation was spot-on and clear, also very realistic because your test leads didn't just appear in the positions to do the test.

@PL-rf4hy 6 жыл бұрын

Great video. Very helpful. Keep up the good work.

@caddy200 11 жыл бұрын

Very well illustrated. I am a retired electrical engineer & that is exactly how you should test a relay. Well done....

@touringusa8760 6 жыл бұрын

Thanks for all your helpful videos, Eirc. I was wondering... do relays ever stick "closed" on the high amp side such as causing secondary air pump not to shut off resulting in motor burn out? Thanks.

@Micscience 12 жыл бұрын

Eric man thanks for this video the way you explain things are very clear and easy to understand.

@RALPHD57 6 жыл бұрын

Thanks for the visual on how it works too!

@Nasernaiam63 9 жыл бұрын

Thank you, you are a great teacher.

@RamblinAround 12 жыл бұрын

Nice vid Eric...interesting stuff.

@valerienixon7275 5 жыл бұрын

Man I love your videos you have the best videos ever you explain everything you are the best teacher tutor I got to give you like a thumbs up five star rating

@opie7afe 10 жыл бұрын

thanks for this video, i dont work on cars for a living but unlike most i do diagnose my own issues and sometimes i just forget how to test something or just to make sure i do a test right i hope on YT just to be sure. this video helped me diagnose a bad cooling fan relay or so i think. no clicky click, got continutity as soon as i touch ohmmeter to the relay so i presume its bad....of course i doubt it has anything to do with my car wanting to buck/lurch in lower rpm ranges...

@careytucker3067 9 жыл бұрын

i had a car do that for a while. it was a loose vacuum line in mine. good luck.

@j.helvie6563 10 жыл бұрын

Really ought check the secondary circuit under load. Sometimes dirty contacts will not show unless they're loaded.

@stuzman52 12 жыл бұрын

Good point about the diode across the coil. One thing to keep in mind is that OE relay coils driven from the PCM usually have the diode across the coil to protect the driver. Cheap universal relays sometimes doesn't have this diode and could take out your driver because of the high voltage spike. Just something to keep in mind.

@MrDakman 3 жыл бұрын

Awesome, car stuff is fun... love it!!! I said the same thing when watching your video right before you said it...

@mfernando8639 10 жыл бұрын

Thanks for the video Eric!

@realkewlmann 10 жыл бұрын

Wow that was explained very well. You should give car lessons in schools lol.

@salazam 10 жыл бұрын

youtube university dawg.

@gabrielanguah8639 6 жыл бұрын

I like it

@slvrserfr 11 жыл бұрын

Very helpful video, currently have starter issues with my car, despite it working fine while running errands, it just stopped starting. Thought it was the starter, had it tested, the starter engaged but even when connected to car - starter wouldn't engage. Battery tested, said it needed to be replaced, but no dice. Remembered when my battery had low charge, it would make a clicking sound from the relay but now when the ignition is turned, there's no clicking sound, just a faint buzzing sound.

@VinzofTay30 6 жыл бұрын

Lately subscribe to your channel and am loving it already. Now start watching your videos. Have a pretty long way to go.

@Portuguese-linguica 12 жыл бұрын

come on man eric has done a grate job please give him that . good job eric keep up the good work .

@kio51423 3 жыл бұрын

Thanks for the great explanation ma guy! 👍

@sharifsircar 6 жыл бұрын

Thank you!!! Your videos are awesome as ever!

@rwbishop 12 жыл бұрын

Yes, making/breaking higher amperage circuits with the probe tip will greatly increase switch life! Doing so is a good habit to get into! Most of (but not all) Power Probe 3's have an easily replaceable snap in switch. It's a good idea to keep a few spares on hand. The switch assembly is Power Probe's "Achilles' heel" Older Power Probes, and early PP 3's have soldered in switches that are a PITA to replace.

@frainthedj 8 жыл бұрын

I have a honda stream with a K20 engine. Been having issues with idling and drivability. lately i checked the fuel pump and ecm relays if they are working properly. could they be the culprits

@ashleyroachclip1 6 жыл бұрын

very instructive and well appreciated

@popxkorn81 12 жыл бұрын

Great video as always. Just a note that the diagram at the top of the relay is when it is at rest (off). I might add that I've seen relays be intermittent, so it may be useful to click the power on the low-power control-side about 10-15 times to see if it ever fails once. If it does, replace it. Also, ESI makes a relay tester (model # ESI-190) for those who need to test relays often.