How to Test a 3, 4 or 5 Pin Relay - With or Without a Diagram

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Here is a video on how you can test a Relay with or without a diagram. I cover 3.4 and 5 pin relays and all you need is a 12v source, a multimeter and a test light.
Multimeter Used in Video: amzn.to/2bngr5q
Test Light Used in the Video: amzn.to/2aRI2fJ
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Please Consider Supporting My Channel at : / rnwdue to factors beyond the control of Ratchetsand Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchetsand Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchetsand Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchetsand Wrenches.

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30 июн 2024

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Комментарии : 598

@bradical8198 6 месяцев назад

9 years later and this is still the best explanation on youtube

@DavidLorellHoskins 8 лет назад

This was an incredibly helpful video. Your diagrams, explanations, and the stability/positioning of the camera all made this so simple to understand. Thank you

@Hoboappalachia 5 лет назад

This is the best video on relays and testing I have found on RU-vid so far. Thank you! Keep it up.

@Angeldenis1987 8 лет назад

I was just watching to learn about relays. I don't need to check any right now, but now I wanna kust go grab a relay from my car and practice. :) . Nice Video.

@KevinIndreland 7 лет назад

You're a genius....your videos are always a big help and you spell everything out for us. Thanks a million!

@speway 4 года назад

Incredibly detailed tutorial. Absolute love it! The only thing I would add is a brief description on what constitutes a ground. Thanks for your positive contribution to the RU-vid community.

@JDnBeastlet 4 года назад

Thank you for this easy to follow instructional video. I used it to test a relay - something I have never done before - and I found it failed the 4th step (the grounded test light did not come on when the relay was energized and powered). Great job!

@mbryant107 5 лет назад

This is an amazing video! I had NO IDEA exactly what relays did, what made them good or bad. It was just something you replaced and hoped you got it right! Thank you so much for drawing this out CRYSTAL CLEAR for me! This is amazing!

@willb5240 Год назад

Thank you! Out of the many videos on testing relays, yours is the only one I could find for those of us who have a relay that has no diagram or numbers at all. Much appreciated.

@TurboJohn74 9 лет назад

I went to tech school for everything a/c, d/c and digital... but fifteen years later not using that knowledge had me lost helping my father with his truck. Your video was very easy to follow, and lit up the ol' brain again. Thank you so much!

@sammacnab3514 4 года назад

I really like this guy ! I was having problems with my ac compressor. I followed his instructions and found the AC clutch relay was bad. Thanks so much for posting this ! You're a great teacher !

@rent2ownnz 8 лет назад

Thanks man.... been a long time since I diagnosed auto electrics a bit rusty. told me exactly what my brain had forgotten in 2 mins flat! good stuff.... Fixed my wiring issue and all running again, but had to eliminate 4 relays to move forward! cheers again!

@hubertwilliams6509 7 лет назад

I just have to say this.. You are a huge inspiration .. You gave me so much confidence and knowledge.. My 2003 Expedition started with a check charging system late February since then .. I've install new alternator, alternator wiring harness, 2 idle pulleys, removed and cleaned tension pulley, checked all my fuses and relays installed new engine belt ..today I got my truck running again and the reason why it did not start was one of the cables going to the fuse box was disconneted

@rplogix 7 лет назад

Hi, your videos and explanations are very clear and helpful for every one. Keep on your great work. I had a car starter that won't start so before I dismantle my ignition switch I will run your tests. Thanks a bunch!

@brians4377 8 лет назад

Excellent job! Thank goodness for RU-vid and those that take the time to help others. You saved me a big headache and cash. Thank you!

@tamerasj 7 лет назад

I absolutely love and appreciate hands on how to videos! Trying to read a manual and focus on tiny pins or such...........whew, thank you sir for easy to understand info!

@robertovermier6200 7 лет назад

Great video on testing the three relay types. Came in handy when trying to determine which of two relays were faulty.

@geomod6850 2 года назад

Thank you. These videos are priceless in helping us keep our old vehicles on the road in these difficult times. Much appreciated sir. Good on you.

@vector226 6 лет назад

I've watched a lot of your videos and have to say, they are the best and most detailed videos I've seen. I feel confident to tackle the job after learning from you. Thanks for your hard work to get these videos out to people who want to learn how to do it themselves.

@TheShady80 5 лет назад

Excellent Video and VERY informative !!! in no way "over kill"..... thank you so much for taking the time to explain every detail so thoroughly...Really appreciated !!

@joeh2253 2 года назад

I just saw this video and it's fantastic. I've watched many testing of relay videos on You Tube and this is the best. I have a 5 pin relay that i needed to test and i didn't know what i was doing, now, i feel comfortable that i will get the correct readings. I will now be able to go to the next stip in getting my John Deere Gator working.

@dentonscott6967 2 года назад

You are an excellent Teacher. I am glad I found your channel. Your information is gold!!!

@davidpettengill914 2 года назад

Great video. Your explanation of how a relays works is spot on. Very easy to understand.

@davidsantiago3360 6 лет назад

Thank you. This is by far the best video explaining relays out in youtube

@mixedlife1691 Год назад

I love how detailed you have made this video! Thank you for taking the time to make this video for all of us that are trying to learn this kind of stuff! The only thing i have not been able to put 2 and 2 together on is when you are grounding as you are testing with the light what exactly are you grounding on? This is probably the simplest answer ever but chaos has had my brain scrambled so please enlighten me.

@papatorr3669 5 лет назад

Just want you to know that you are a God send, Thank you so much. Your channel is my favorite in the DIY Car category. You've helped my son as well who is in the Air Force and is keeping an 88 Dodge Shelby Daytona on the road. I bought a fixer upper 96 Camry 2200 which started right up, but now cranks no start. Simple, thorough, humble, professional, educational, useful, effective...OK I'll stop. Keep up the good work. More technical is more better ; ) ! May not get as many hits, but the ones that do appreciate it more. Harbor Freight free meter?

@tobydufrene1880 3 года назад

Im having trouble with my 2018 jeep Cherokee. Your video will definitely help me when checking the relays. thanks for sharing the knowledge👍

@interludo 8 лет назад

So clear. Wish all video tutorials on tube were like this. Thanks.

@edmundochaparro-barriguete1215 5 лет назад

You are the man with the plan. Excellent video. Thank you so much. You really know your field.

@samuelparra1510 9 лет назад

Thanks for explaining how to test relays and demonstrating how they work. I really do appreciate it. I'll be looking forward to viewing more of your videos.

@myRatchets 9 лет назад

Samuel Parra Glad to hear you liked it, thanks for commenting, cheers.

@lakaidude99 6 лет назад

This is a great video. I'm pretty handy with a multimeter, however I've never been able to figure out testing relays. He makes it perfectly clear with full explanations for each step. I used a 12v jump box, my multimeter, spare wire/connectors, and made a phone charger adaptor that usually goes into a 12v cigarette lighter port in a car work as my tester (it has a small red light on it so I could tell that it worked). All in all it took less than 10 minutes to watch, setup, and go step by step to confirm that my 5 point fuel pump relay is in working order. 2 thumbs up, great video!

@Dragon-Slay3r Год назад

Lol

@toantran1 4 года назад

Thank you for showing me how to test a relay without a diagram. It's great !!!

@jd5787 4 года назад

Thanks, I have a pair of relays in a wine fridge that may be problematic, I think your video did a good job at explaining how to troubleshoot these things! Thanks

@kellypeterson3660 2 года назад

Fixed my mercedes using this video. Had 74 ohms on 85 and 86. Relays opened and closed just fine. When 85 and 86 were powered and circuit closed, 30 and 87 had erratic ohms from .05 to 34.00. Tested 5 relays and that was the only relay with that problem. Replaced and now cooling fan comes on. Great video.

@alexandergonzalez2232 7 лет назад

Awesome learning from you the big concepts of integration and the detail points and patterns, it enhances my understanding, thank you!

@kellykemp9336 3 года назад

Fabulous, great information. I didn't know 'come here from sickem' before viewing. I couldn't even use an Ohm meter and was able to conduct all the tests following your expert instruction. Thank you for your time and Service.

@Damienjking 4 года назад

Another great video and an outstanding explanation. I would offer just one small word of constructive criticism for future consideration and I hope you receive this in the helpful way its intended. On the paper you layout the pin configuration and the wiring diagram which is very helpful to aid understanding. The one improvement I would recommend would be to make the wiring diagram match the actual pin layout. In other words, both the pin layout and the wiring diagram would have the pin numbers located in exactly the same place. This would make it easier for viewers with little electrical experience. I think this may be why a few people didn't follow what you were saying. Even with that small area for improvement, this is an excellent and thorough video. Thanks for your efforts.

@ericb5447 2 месяца назад

What a great teaching video. Thanks for putting in the time on making this for us to learn.

@lukemartin7029 9 лет назад

This is the best video I've found on relay explanation. Thanks for posting.

@myRatchets 9 лет назад

Luke Martin It got a bit long but alot of info in there for people with patience. Thanks for watching, cheers.

@frigerzoid 9 лет назад

Luke Martin Agreed!, great demo and tutorial.

@commonman80 7 лет назад

Where did you ground The Test Light in the 5 PIN Demo? To The Battery Ground?

@froglegs4910 6 лет назад

He is the best auto professor The EXPLANATION SO CLEAR !

@highlandminger4009 6 лет назад

May be an old upload, but it saved me from buying a fuel pump relay that I didn't need. Thanks

@WV591 6 лет назад

one of the 3 best auto repair channels on tube. i call it Auto TU

@green1394 4 года назад

You are a good teacher my friend,,,,,keep up the good work,,,this world needs people like you,,,MaashaAllah,,,

@pablochavez9087 5 лет назад

Awesome stuff. You are great at explaining this. Thank you very much. Learned more here than in auto classes

@bucky2292 4 года назад

best explanation of testing relays i ever seen ! good job mister !!

@lspalla65 8 лет назад

Thank you this was very helpful, the only thing I didn't have was a test light when I did your test. don't know how important this is to the test, but everything I did do showed the circuits to be working correctly.

@DerekGHikes 4 года назад

Thank you for the refresher, great knowledge... been a while since I've done this.

@wolfythelobo 7 лет назад

Excellent explanation... I think I can tackle those relays now Mahalo for your time and effort to share your knowledge.

@trevorfrillman8842 7 лет назад

Awesome video! Had a problem with the car but couldn't narrow it down. This helped a ton!

@michaelhorbovetz1820 2 года назад

I appreciate the step by step instructions you gave on testing relays

@highlandminger4009 6 лет назад

This may be an old upload , but the section on diagnosing a relay w/o diagram stopped me from buying a fuel pump relay I didn't need...so thank you.

@motoprophet3981 7 лет назад

Great video. I have a Lincoln LS that would not run. The relays all had good ohm readings and would click when tested. It was the last step that tested the pulled voltage, that revealed the two bad ones. Thanks.

@daveyusa1884 3 года назад

this was an even better, maybe the best, explanation, thanks. my relay clicks, resistance goes to 0, but using a light on the terminal does not light up, a bad relay! without that light test, I would have thought it was good, thanks MUCH!

@michaeld9731 Год назад

Thanks for this information. You have saved me a whole lot of time and I am confident I’ll be able to test the relays for my radiator and a/c cooling fans. 👍

@vincentesolon2210 5 лет назад

I really like you well informed and detailed videos. I currently also have a 1995 Toyota Camry with a cranks but not start weekly. I will have to look at the nss . Really thank you a lot for your many 1995 Camry videos.

@raytovar6212 5 лет назад

Thanks this video was so well explained that even i was able to understand an checked my two relays and kept me from wasteing my money.

@potterg04 3 года назад

Great video 👍 I appreciate the facts about relays and how to test them correctly 👍

@philg6757 7 лет назад

Top notch info and explained beautifully.Thank you.

@hichamouahid4099 8 лет назад

Thank you very much. Indeed this is the best video explaining relays

@CesNwk10 9 лет назад

by far the best resource for checking relays out there good stuff dude

@dragan3290 5 лет назад

Best tutorial on relays ive seen cheers mate!😊

@joeandgod1 9 лет назад

I agree with spelunkerd, that's the best,easiest, most understandable explanation on diagnosing relays on youtube.

@myRatchets 9 лет назад

joeandgod1 thank you sir for your comment and watching.

@nbo7383 3 года назад

they only we can pay your effort sir not to escape the advertise in you video and subscribed..big help to the people!

@lakshman0680 5 лет назад

Brilliant video. Simple and easy to understand. Awesome. Thanks a ton

@1506pinkers 3 года назад

Excellent. A very clear and comprehensive video. Thank you.

@enkisonofanu2301 5 лет назад

Thanks for that, my relay does not have a diagram, but with your help, I can test it. 5 thumbs up.

@erichlg 9 лет назад

Thanks for taking the time to make this video. It's 9pm and I am trying to cure an intermittent crank but no start. I now have confidence the relays are not my problem. On to the next step......

@myRatchets 9 лет назад

Erich Greer Nice, glad to hear it helped you out. Hope you figure out the problem. Come to think of it I might do a video on Crank no start situations.

@stephandelange1776 6 лет назад

Thanks for giving us good front view and explanation video on relays and how to test them, Good Videos really!

@nigelkendall5892 6 лет назад

bit confused about relays until i saw this, this is a great video thanks

@bonitabonining6047 5 лет назад

your so nice..sir...this video of your's helped so many people to understand.. and to make it of thier own..thank you...😊...im bea from the philippines

@1905AdamH 2 года назад

Utterly awesome vid! So concise and clear! Finally I understand!! Thank you so much!👌😀

@adriandeb2710 8 лет назад

Very helpful video nice and clear to understand.

@PhanHung1973 Год назад

Thanks a lot. Very understandable. I am Vietnamese but I understood 95%

@mikeyyani 6 лет назад

Te bendigo y gracias por su tiempo en darnos conocimiento para estos problema . Sigue adelante!!!!

@jojozepofthejungle2655 5 лет назад

Fantastic, now I know what a relay is. The last video was just pictures, I'm thinking like wtf. Excellent video dude.

@diegoG928 7 лет назад

Good explanation. Simple. Straight forward.

@gregvanderhorn8394 2 года назад

This is a great video. I seriously mean that. I am in the middle of re-wiring my motorcycle and organizing a rat's nest of wire. This video has helped me greatly

@stefanvanvuuren3931 4 года назад

Thank you so much! That was extremely helpful!❤️

@alaskanvortex5673 7 лет назад

AWESOME, VERY CLEAR AND PRECISE.

@passingasgarage2375 11 месяцев назад

Soooo, I have a Lotus Esprit V8 and was having some CEL codes and am trying to get to the root of the issue. I had a host of CEL codes related to the Heater circuit on the O2 sensors. I just replaced all 4 O2 sensors, as there are reasonable in price and easy enough to get at. The codes reappeared and so I thought.....after looking at the Fuses and Relays there was a relay for the O2 heater circuit. I pulled the relay and started to order a few relays.....and said let's check it out on RU-vid and here I am. Your video made sense and was informative and I tested the relay that it worked, and that the resistance was good........sure enough clicking away strongly and the resistance was about 76.4, so within your prescribed range. I might have to test a cold start on the relay plug in and see if pin 30 is getting power at start. I would think it should when cold to heat up the O2 sensor. Thanks Again

@joakimmattsson694 8 лет назад

Thanks for a very good video! I will show it to my pupils in mecanic workshop

@Walkingcamel567 8 лет назад

great tutorial! Now I feel very comfortable testing any relay-Thanks again and keep up the good work.

@alandmunk3h 5 лет назад

This is totally great. Super clear and I feel smart now too :)

@sroysr 6 лет назад

this is the best how-to video i've seen yet.

@AustinMics 8 лет назад

Great series! Thanks for the info. At 12:53, I think you meant 30 and 87a, to match your diagram. (Normally closed connections)

@ernieg1415 8 лет назад

thanks for the video. you have helped me with all of my questions and with testing the relays in my cadillac. thank you

@johnnybailey2004 5 лет назад

+Johnny Bailey and

@jasonsmith6776 5 лет назад

Best relay vid on RU-vid thanks

@safetyalways7788 3 года назад

My toyota 90987-t2003 relay resistance is 168 ohms. Tested up to 3 relays in my car. All same value. I think the resistance depends on the manufacturer of the relay and the amount of current designed to pass through to them. And all the relay are working well

@kenno251 6 лет назад

Great video, the visualization was a big help to me also, thank you !!!

@sonyaadams7721 7 лет назад

Thanks for the great info. You might also want to add a step to check that when the relay is NOT energised, that there is no voltage on pin 87 - if there is it would indicate the relay is stuck on. Thanks again.

@JoeUrbanYYC Месяц назад

Great video, and a historic one! The video where he went from "Hey what's up RU-vid!" to "Hey what's up do-it-yourselfers!"

@brandonaxworth2771 5 лет назад

Great explanation video. Thank you for posting!

@chalkywhyte8585 8 лет назад

Been trying to sort electrical problem on Suzuki quad..Thought a relay was ok because it "clicked". Thanks to your in depth video I now know that it is shot. No power to the light, so I pulled it apart and lo and behold, a blown part on the circuit board. Keep it up, you are good

@myRatchets 8 лет назад

+Chalky Whyte Sweet, very glad to hear the video was helpful. Thanks for your comment. cheers

@lehoa28 3 года назад

Thank you very much. This video helped me diagnose my signal stork problem. 👍🏻

@rickfoster5859 4 года назад

TERRIFIC! You're a great teacher and very helpful. Thanks!

@billc2381 9 лет назад

Well spoken, nice diagram(s), tools and easy to follow procedure. Thank You.

@myRatchets 9 лет назад

Billy C np, glad you liked the video. thanks for commenting.

@wilmi79 8 лет назад

Best video of its kind, I found it very helpful. Thanks! I'm going to subscribe to this channel. If the other videos are as good as this, I will be very happy.

@myRatchets 8 лет назад

+Michael Williams Welcome aboard, hope you enjoy the video's. cheers