How To Test a Relay (and How Relays Work) - in 8 minutes

[@adamantiumbullet9215]

No annoying techno music in the background. No rap music as an intro. No unpackaging a new relay and meter, with an explanation that he has no idea how either one works but will make an instructional video anyway. No pictures inserted into the video of his dog or a past vacation. No ads promoting crypto currency, erectile dysfunction supplements or hair loss pills. Two thumbs up, my friend. Excellent video.

[@kickinthegob]

I'm a professional educator (I develop courses and certification packages in mining, oil and gas and engineer) and tip my hat to you sir. A very well designed tutorial.

[@mxcollin95]

Yep…this guy is good! All good info with no BS!

[@Mr0rris0]

Seen any good channels about mining oil gas and engineer? Or maybe know banks that tolerate "those people"? I'm in texas so if I get involved in those fields I'll be the only person concerned with how to not die, especially since I'm not a native texan and the state bird is the "it'll be alright" aka they all want me dead as soon as I open my mouth and I'm not obese and inbred for 6 generations. They shot my Gloucestershire old spot cross male and started raising their own hogs... Then got tired of it and quit... All they do is poach deer sprinkled around the macleod gas field and sell meth... This hunter biden uproar is just shadow projection... What happened to the American dream eh?

[@Budza-dq8wk]

This is Fantastic.... You are well versed in Auto Electrics. What a tutorial. Short and to the point. Well explained. Bravo!

[@antoinetteISgay]

Ï⁹8​@@mxcollin95

[@conqueringlion420]

So your a KZbinr for companies who thinks your above a platform, I got cha. Yawn

[@valis992000]

The rarest of things on KZbin, a concise, yet detailed explanation with clear examples and easy to understand audio and video. I learn a lot from these DIY videos and this one was as good as they get.

[@GrandmaandMrRon]

I'm 71 and never knew what a relay was, how it works. Much thanks. A little knowledge goes a long way.

[@kimvowell261]

Hey man. I just turned 71 and also just now learned about relays. Never too old to learn something new!

[@robertramirez3994]

Excellent tutorial very well explained. Usually there are many people that are afraid to look at anything dealing with electrical concepts, but you explain it in a way that it's simple to understand. Thank you very much.

[@erichfaust3366]

Ditto!

[@PhillipCasper]

My girlfriend and I have been learning how to work on cars, I have much exp. I have to say your videos are the easiest and most educational ones I have EVER seen

[@Clutch_McGowan]

Its people like you that make the DIY Mechanical world go round - THANKFUL

[@sfort42]

Your video is the only one that discussed checking both the resistance between pins 85 and 86, and supplying power to these pins to test the resistance between the other two pins after the relay is activated. Great job!

[@codyfield6859]

This is an exceptionally well done video. Thank you for actually showing the internals of a relay. It makes understanding them a lot easier for a visual learner like myself.

[@ChePerez-2332]

Honestly, it's one of the best videos explaining how relays work. Thank you!!!!!!!

[@floydrturbo1]

Very informative presentation. Been looking for a straight forward explanation and this is it. No background music, good clear sound, excellent video production and graphics. Well done.

[@MerajTypeBeat]

Very good video. People that can explain things this well are a godsend. Appreciate your work!

[@edwinquinones2089]

Clear, understandable and simple explanation. Thanks, two thumbs up (literally) 👍👍

[@NiyaziTopsakal]

Yes totaly right, Thank you for your successfuly lesson.

[@GruntMoan-r7f]

Thanks for the refresher. Knew this when I was younger, then over time, I just swapped out relays for speed of diagnosis.

[@charlesschuster7963]

One more vote for an informative and well presented video. It should be mentioned that if the relay is suspect and you don't have a similar relay handy, first use your voltmeter to ensure that terminal socket 30 has current. If it does, put a jumper between terminals 30 and 87 on the socket and the downstream device should be activated. If the device doesn't work with a jumpered relay socket, current isn't reaching the device and you may have a break or short along the wire. Don't leave the jumper in place after you park the car, or you may drain the battery; the circuit may not be made to carry current continuously.

[@larryfine4498]

Great video. A good example of a 5 lug relay is a high/low beam circuit. The same relay can be used to power both by supplying power on the control side when light switch is in low beam position and turning the control side off when in the high beam position.

[@negativeindustrial]

I just found your channel yesterday while attempting to diagnose a dead power window/lock circuit on my daily driver Lexus LS400. While I knew about 75% of the tips and tricks you so perfectly illustrated, I am very happy to have found this channel. I’m pleased with the extra 25% of knowledge I gained. But, I am even more pleased because I will be sharing these videos with my two sons who also love working on their Toyotas and also a young father I am attempting to mentor through his first car ownership. He recently bought a $650 1996 Dodge Dakota that is what I refer to as a “One of everything car” because it needs one of everything nearly. Thanks for helping me pass our cumulative knowledge to the next generation. Merry Christmas to you and your family! (Now, if I can just fix this overly complicated power window/lock/sunroof/memory seat adjustment circuit on this 1996 LS400, I’ll be happier still)

[@negativeindustrial]

I’m still stuck on this thing. It’s a 1996 Lexus LS400. I’m getting low and/or erratic voltage at the kick panel fuse box on the power circuit and none of the doors locks, windows, sunroof, power adjustments in the seats and telescoping wheel are all inoperable. Everything else works as new. I did have an extreme amount of smoke from burning insulation under the dash in the vicinity of the kick panel fuse box. I bought a replacement unit but with Lexus security I’m wondering if I change it out will it activate the immobilizer or worse? I’m not opposed to creating a new standalone circuit/fuse/relay to bypass the stock fuse box but I thought I might ask if you thought replacing the fuse box might cause problems with other systems. It is from an identical LS400 of the same model year and options. Any help you can provide, even if it’s just to point me to where I should test with my multimeter would be greatly appreciated. I would be happy to contribute to your patreon or similar if you can help me repair or hotwire these windows, etc

[@alvingoodman6539]

Thank you so much. I use these types of videos to learn. I wish I had these when I was young. I’m 73 and learning new things help keep me sharp.

[@USMC-Sniper-0137]

My head just exploded

[@treadhead]

DEVIL DOG. -- CLAYMORED PERHAPS ??????

[@disrael2101]

Best explanation I've seen so far for this topic, please make more videos about practical topics with a practical demonstration & explanation as u did here :)

[@williamalvarez4912]

I have to say far the best example of showing what. Everything else,was for, an the way they work. Only the first one I have seen.thank you for your time.

[@michaell3711]

What a magnificent video of explaining electrical functions in a simple and easy to understand manner. I have been a novice to electrical works but capable mechanically. This is important for me. Thanks again 👍👍👍🙏!

[@myouger1]

Ditto!! I'm the same way. I actually feel confident about testing relays and how they work and their function.

[@anthonydos7506]

Wow that was a very detailed explanation and demonstration thanks for taking the time to educate the viewers😊

[@donaldcook6997]

are you over 12 ... if so you propably have a good paying job and take your car to the shop...did not have to watch video..just heading and over 8 mins to say it tells me he thinks he's really smart but really he just found out about it.. I learned that stuff as a kid when I wanted to know how things work.. bike apart at 7.. dads lawnmower at 9.. first motorcyle apart at 13 & still going in my 70's

[@anthonydos7506]

@@donaldcook6997 R u referring to me u can't be serious am confused as to what the heck ur talking about?🤔

[@gee620]

@@donaldcook6997 HEY DONALD DUCK WHO CARES IF YOU KNOW HOW TO DO IT , WE'RE NOT EVEN ASKING. NO ONE CARES. 🤣🤣🤣🤣🤣🤣

[@billmers3219]

@@anthonydos7506 he's definitely a mental case

[@lawrencetasker212]

@@donaldcook6997 muppet

[@giuseppepiodimezza163]

Thank you very much ,as an engineering student who likes to work on cars your video helped me a lot going from pure theory to real examples !!!

[@genepenna8549]

Great! Simplified explanation that helps make sense of electric relays and circuits.

[@hansel1196]

Very clear instructions. You tested all functions based on schematic diagram to verify a bad relay. 👍

[@myouger1]

Amazing! Only video you need to watch about relays. I'm not very good at understanding and testing automotive electrical equipment. After watching this Great video, I am confident with testing relays and how they work and what their function is. A must watch video for every diy mechanic. I'm looking forward to watching your other videos.

[@thomaswahahauw560]

God it’s like you are the definition of teaching. You showed a lot of circumstances. !!!!! I love it 10000000000

[@jaytodd5809]

I have been clueless on those..now I think I have a good understanding!

[@burtoncalderon6601]

Excellent 101 on Fuses and Relays, Very well Explained, Very Detailed, Very Understandable. Very good Job. Continue w/ these lectures 6:55

[@tonystokes9950]

Very educational and to the point.I looked for over an hour before I found this video it is exactly what I needed to know to fix my truck.Thank you sir you are a good teacher.

[@Balajis_Mart]

This is simply a superb explanation that any layman can understand. Hats off! Please keep posting such useful videos, which would help thousands of people like us.

[@nansfavs]

I love your teaching techniques! Thank you for sharing your knowledge!

[@Ratlins9]

What an excellent video. Very informative and step by step instructions for checking relays. You hit it out of the park, thanks for sharing your knowledge.

[@Frontseat_Driving]

Easily the very best explanation of relays that I've come across. Clear and concise. Great job, I'll share this with my followers.

[@josesanchezjr2704]

f FF çç I'm by

[@ivannovotny4552]

Make It Easy Mechanic : Thank you for another logical, simple and informative presentation. Again, I've learned a lot.

[@ThatGrl-li1156]

You explained this perfectly! I watch so many stupid videos that taught me nothing before I found this one. You helped me completely understand how these relays work & how I can test them on my own. YOU ROCK! THANK YOU!

[@ibrahimmomani9451]

Simple, short and does the explanation that is needed

[@ohdeerme]

Best explanation of what a relay does, and it how it works and how to test it. I will bookmark this video for future reference........Thank You for this learning video !

[@TheBlaert]

Excellent video. Even a basic understanding of electricals helps massively if you do your own car work

[@lynnesaro7772]

Well done very informative. Easy to understand for one who doesn't do this every day saving critical brain cells for the actual diagnostic work. I have an intermittent start and stall that I am working on.

[@strivin2b205]

You have made understanding how relays work very easy for me. Thank you so much!

[@lupania1]

Great video . This is the first time I'm following you because I had a problem with the windshield washer and the tester indicated the relay. It was very instructive for me. I learned how a relay works and is checked and about its role. You explained in a very comprehensible way. I became a member on your channel and I am convinced that I will learn many more things in this field. Thank you very much !

[@TheWillis1237]

Hands down my favorite creator and I just found you, you make what my brain can understand actually able to understand. I’ll be a forever subscriber and I’ll continue watching all the videos today!

[@michaell3711]

Likewise.... I subscribed.

[@jimboyle7383]

Best vid on this subject by far. Most don't include the detailed troubleshooting to see if the relay is even getting any power. Just checking the relay is only part of the troubleshoot. Thank you for this video. Liked & Subscribed

[@ANDREI307]

I am amazed by how good this video was considering that I am still learning electrical stuff, and I have a hard time understanding from some people. Thanks for the video ❤

[@bkofielgato6675]

Listening to a person who understands the theory and the concept. Clear logical teacher indeed ! Excellent excellent

[@jaredhopkins5642]

Excellent and thorough explanation. Perfect demonstration on how to test! Thank you for another superb quality video.

[@skiittah]

I did Autotronics and this is teaching me alot

[@abhaynatoo]

you are an ideal professor, a teacher, how a teacher should be. thanks a lot.

[@kimpliny]

What an excellent lesson about relay! I have watched a few other videos about the relay, but I was still not so sure if I really understood all about it after watching them. I am so happy that now I really know about how the relay works and how to check it. What a clear, detailed, and well-illustrated tutorial video! Immediately subscribed. I have also purchased the KZbin Premium just because I want to download this video for future reference. Thank you so much!!

[@karahja]

100% from me, I have never seen a informational video so through. simply excellent.

[@jmer3536]

Ive watched many videos on what a relay is, what it does and how it works. Your video is the best Ive seen. Excellent Job. I also love the how to test a relay part as well. I have a much better understanding and learned so much more

[@Picklejam08]

In older vehicles, it is prudent to replace Relays in the 20 to 25 year range proactively. The cost is modest. While most Relays will probably never reach their open/close cycle life, age can and will compromise their integrity over time. Swapping Relays can be a quick fix to get you up and going... but who wants to crack the hood and troubleshoot on a cold winter morning when you are running late for work or school. Just something to think about. Great Video!

[@MinnesotaJake]

Pro grade sir. I appreciated the "hotwire the part straight to the battery" for those of us that may not be in possession of a multimeter or test light. Awesome!

[@jennolson3604]

I think we will be trying this next. I have intermittent starting issues in a 99 chevy express. Grounds are good, fuel pump, filter all-new and engaged, pressure is fine. All the other issues I see say there would be engine issues when running. When it DOES run its a champ. Now, the battery is drained (I think from us trying to start and it will not) I can only hope its this simple. I have had people say ECM and ICM. But when I read about these, they say one of they symptoms is poor performance which we do not have. Thank you for this video. Here is hoping.

[@noahway13]

Nearly perfect. I wish you would have gone over why the, what purpose does it serve to have one pin normally closed and then switch over to the other closed. But you are waaaaaaaaaaaaay better than the other videos. Thank you.

[@heatshield]

The normally closed pin can be used for anything that you want to stay powered on when the relay itself is not being powered. Let’s say I want to install a really loud aftermarket air horn for signaling while offroading but I want to keep the original car horn for normal emergency use on the road. I can cut the normal horn power wire and connect the ends to pins 30 and 87a (the normally closed pin). Without doing any other wiring at all, the horn will operate as normal, just like I never did anything to it. Now I can make a new circuit for the new horn using pins 30 and 87 (normally open). Then use a toggle switch to power the relay when I want to be able to use the new horn. Of course you want to be sure you’re using fuses for any new electrical equipment and I don’t recommend anyone add more points of potential failure into existing equipment like in this example, but that’s just one example of how I’ve used that pin in the past. Maybe a less complicated example would be to use the normally closed pin to power a warning light letting you know that you haven’t turned something on yet, that you really should turn on. Once you turn the thing on, using that relay, pin 87a is no longer powered and your warning light turns off. I used one that way for my dash cam system. If I happened to forget to turn it on I would notice that light pretty soon after getting settled in and moving.

[@jorgeandjessica579]

Without doubt, the best, most informative and most easily understood video on how relays work. I had little knowledge about how relays work before I seen your KZbin video. Now armed with your knowledge, I can fault find (diagnose) many scenarios when my car or bike doesn't start and save myself £ or $ in garage repair costs. Good video, please make a lot more, Barry from Chester (UK).

[@akselazulay4459]

since it is easily explained it is easily understood. one of the best videos about relays

[@stevenvasquez7753]

Still haven't figured out my start issue but god did I learn a lot. Thanks!

[@4WinterTires-uv1mr]

Best video about relays explantation ever! Straight to the point and use words that easy to understand. Thank you!

[@pepelopez5065]

Thank you so much for putting this tutorial together. It was very well explained. I was able to use this video to find the bad relay my car had. 👍

[@Callupbrotherron]

Very well done, easy to follow due to simple explanations of complex problems. Thank you for not only teaching about relays but also sharing teaching methods that demystify the complex.

[@Awake333]

very knowledgable and clearly explained Thanks man !

[@rcollins4958]

Im seeing many professionals giving this video props. I thought it was nicley demonstrated, but these comments made me hit SAVE!!😊

[@reginaldjackson3754]

Love your channel you take your time and explain the process throughly thanks

[@RAYMONDMUSSA-t8x]

BECAUSE OF YOU I KNOW HOW A RELAY WORKS THANK YOU

[@donhaywood6542]

I like this video! Clearly spoken and explained very well.

[@michaelosmon]

I have a tool called a power probe, it's a glorified 12vdc test light that can also inject power or ground, and has a ground wire with alligator clip at the tool handle just for the purpose of testing components. This tool in conjunction with a beeping continuity tester on my multi-meter makes it very easy to test relays. Relays are incredible devices. Very fascinating. I have a 28 year old beater car that I keep for emergencies and recently the electronic radiator fans stopped running. The module to get them working again was a couple hundred dollars. By troubleshooting the relays for the fans I discovered the module grounded the coil on the relay which turned on the fans. So I added a relay which is triggered by the accessory switch that grounded the coil on the fan relay, effectively turning on the fan while the car is running for about $5. I know it isn't the proper solution but my car isn't overheating.

[@mrgreen916]

Clicked from mild curiosity. Couldn't stop watching. What a masterpiece of educational art.

[@Sizorhandz]

Well done, everything was explained well, and right to the point.

[@thermos750]

Well done, easy video to follow. I always had a good understanding of a relay but this was a good refresher. I have a 2019 Kia Sorento and the Map lights inside the car are not turning on. I have power when I manually turn the lights on but the lights will not go on when the door opens or for the button that turns all the dome lights on. So it cold be the diode in the car lamp assembly or the relay is your video suggested. Thanks and good tip for switching out the relay and trying them in different spots.

[@davidcroker5660]

Thankyou for this tutorial trying to fix starter motor issues on a smart car and this really helps

[@daviddowns7552]

this video is thumbs up👍 it actually helped me understand relays. i dont know too much yet on electricity but want to learn. good video.

[@BrettHoustonTube]

Wow that was an exceptional tutorial. Nice imagery as well. My Dad was an electronics engineer. Usually I call him for advice on relays... But he's gone now. Thanks for being there!

[@ernielozoya5492]

Very good . Expand it all nice and slow this one I did not have to watch 15 times . Thank you very much. Great job brother😊

[@microzap]

Thank you! This is a great video. Was going to buy a relay tester, you just saved me some $

[@xltoth]

Yes, excellent vid. Relays provide safety in keeping high amps (load) away from driver controls and economy in the ability to use thinner copper wire to the relay.

[@78Arturin]

Very well explained sir! Thank you so much for sharing your knowledge!

[@robertg9514]

Exceptional tutorial with easy to follow concepts that explain everything. Thank you!

[@lukemckay3262]

Great tutorial 👍 very succinct and well considered. Many thanks for sharing your hard won knowledge.

[@jagathchristopher4103]

Great video, I learned a lot of things about the Relays.

[@ghostboi3391]

very educational and straight to the point 👏

[@dongkapuyawn5107]

Thank you professor! Detailed and in laymens term, much appreciated!

[@marcoodrio2787]

simply fantastic! You are a great teacher, thanks a lot!!!

[@mxcollin95]

Your videos are worth their weight in gold! Thanks man 👍👍👍

[@thinktanium9789]

great video! ive seen a few about relays but your- *clicked* i get it now, thanks again

[@pvt.2426]

An excellent and coherent explanation for a D.Y.I. mechanic. Thanks.

[@sargunamm1694]

Excellent demonstration on relay and its functions, let me search for the suit and tools to go straight to my garage 🎉

[@deonerasmus5629]

This was by far the best and down to the point video I have ever seen.Congratulations

[@b.bailey8244]

Excellent and clear instructions and demo! Thank you!

[@sunoclockoneday2576]

Holy $#!T !!! I finally learned something about relays . Thanks !

[@sibusisomadondo6068]

On the spot tutorial... Keep up the good work 🙏

[@shs2122]

Superb explanation. So easy and simple to understand.

[@TangoNguyen]

It is a helpful to make me clear to know the relay circuit test. I am very appreciated very much.

[@VitorMadeira]

Quite an essential video! So sad I could only find it today. This is *precious*! Thank you and greetings from Portugal.

[@TheBestOfLifeCambodia]

You remind me one of my physics teachers! Very well explained

[@johnnielewis9896]

thank you...a very thorough and concise bit of information and is more than enough, when put in practice, to eliminate error when testing a switch. ... peace.

[@eddiesalinas3693]

Easily the best video I've watched explaining and troubleshooting relays A+++++

[@Master-Cunninglinguist]

THANK YOU SO MUCH! I have a random issue that only presents itself well after car been running. I want to check all my relays and didn't know how to test them.