I'm glad I ran across your video. I tried watching other videos and reading how-tos. None of them made sense to me as they weren't explaining how the relay works. They were only showing how to test with whatever relay they had on hand. It didn't help at all. After your video, I can test my relays in seconds and now that's I know how they work I'll never forget this how.
Ive been wrenching for 10yrs and been avoiding electrical testing. Time to take it head on as I'm doing lots of repairs as a side job for extra income. Once i master my diagnosis skills my price is going up!
Thanks. You explained the 87a which the other videos didn't make as clear. I ordered a repair manual. I hope the wiring diagrams are helpful. Getting prepped so when my starter doesn't turn over next time I can see if bypassing the relay will work and start to narrow down my problem.
Relays and solenoids are considered high current switches a lot of people are unaware of this. Yes the control side 85/86 is switched by the computer most times in an automotive application. Great video and I love that meter.
Some one said, why he talks so much. If you really want to learn something. Then listen to the whole thing. Anyway I loved the video. Now I know how to check relays. Thank you so much for your time.
This actually sense to me now. I still have questions and some confusion as to why a relay works for a short period then stops. However I now can begin going back through my system
Great video. I was looking into buying a new multimeter and this new one with chargeable battery and the auto feature looks amazing and only being 40 something dollars on Amazon is a great buy. Thank you. I'm buying one now.
My only quibble is that it's not a resistor between 85 and 86, it's a coil that, when energized, creates the magnetic field to pull the relay switch to close the 87 and 30 contacts.
I had a little understanding of relays, when I tried to add fog/driving lights on my '72 Toyota Corolla & a little background in electronics. However, I never completely understood what the numbers stood for & exactly which terminals did what, even though I successfully wired the lights. Now, as an old guy, you helped really understand. Thanks!!!
I'm in the exact same situation. Took electronic classes in HS and learned more in the army. Being in my late 50s, I am finally a pro with relays. Lol.
I didn't have a 12-volt battery so I used a 12v battery tender for power. It performed both tests perfectly without worrying about damaging the relays.
This was really cool - I would love to see more about this. Specifically how you walk through a real problem when it's not some major component like a relay or a fuse. I'm dealing with a fuel pump that's not working. Motorcycle sat for 8 years with fuel in the tank so I knew I needed to replace it. Since I was already in the tank, I replaced everything previously in the tank....the fuel pump, pressure regulator, fuel filter, float sending unit, all fuel hoses, wiring harness. Now the problem is when I turn on the ignition, the pump still doesn't sound. I added 2 gal of gas and still nothing. I even made a long hook so I could manually change the float sending unit and the level on the fuel gauge didn't change. SO I'm thinking it's not getting any power to the pump. Fuses were fine - I checked the continuity and they're great. Changed both relays cuz they're old and cheap....still nothing. NOW I'm going to have to test the voltage at the relay and walk it forward but I don't know exactly how to do that. I'm also thinking I should check the plug on the outside of the tank that delivers power inside the tank. However I tried doing that but I'm honestly not sure if what I'm seeing is what it should be. It's confusing when you've never done this stuff.
Diagnostic question maybe answered from this video. I had clicking lights in the interior and windshield wipers. They drained my battery. I am going to try this now! Thanks for the great video. Easy to understand
Sir, YOU make this video easy to watch. your teaching mannerisms are most helpful. thank you for breaking it down to my level. great stuff. I subbed based on this video.
Excellent Video, great explanation of Relay functions. Love the test board and your Stainless Table to write on . Great Camera angle also 🙏God Bless You.
This was a great video. Thank you. I’m wondering…can you then reverse and remove a component from this? If it’s a 5 prong feeding a faulty antitheft system preventing a vehicle from starting, can we eliminate the system and put a four prong to bypass?
Great video my friend. Well put. Maybe some more specific examples as used in the switching process' in the car would really embed the learning. Knowing there is a high and low side is key, but how they interact in the different automotive situations ( indicators, pumps, etc ) exactly wouldbegreat, but maybe that video would be too long! Super video, I'm ordering the crocodile clips!
Can I just use a spare 12 volt mower battery with some alligator clip wires to energize the relay while testing? Do I risk damaging relay? GREAT video and explanation
AWESOME VIDEO!👍🏽🇺🇲 AND THE MOST HELPFUL IN EXCELLENT DETAILS! 👌🏽🇲🇽 YOU EVEN BOTHER TO GIVE US ADVICE AND LINKS ABOUT MULTIMETER THANKS A LOT MAN! 🇲🇽🤜🏽💥🤛🏼🇺🇲
Between 85 & 86 you refer to it as a resistor. It’s actually an electromagnetic coil that pulls or releases the pivoting contact point, right? I’m sure has resistance, but it’s not a resistor in typical electronics terms. Great vid though!
See the answer I gave to @fix135 above. In addition to that, a coil is made of of loops of wire and wire has resistance, so technically it's also a resistor.
Because of the way you explained how to test a 4 pin and5 pin relay, I believe that I will be able to test a few relays on my 1999 GMC Sierra truck. I noticed that you used a 12 volt battery with two short wires plugged into it. Where can I get a battery and the two short wire pieces from? I see that I can get the set of wire leads with the alligator ends attached from amazon.
I tried to verify my headlight motorcycle relay everything was good until i tried to power it with a 12v parkside battery, when i touched the terminals with the wires it shorted… was the relay bad or did i do something wrong I put a wire to 86 on relay and - on battery and another wire on 85 relay and + battery
Helpful but you did not include anything on the last relay type the thin rectangular one. The one I needed that has no numbers marked next to the pins. So I cannot figure out how to check.Any suggestions on what kind of video might have that. What type of relay should I search for? Again helpful but never got to the last one. Shown but not mentioned or discussed so I am clueless on how to fix. If you can please advise. Thank you.
Hmm. I've got relays that don't have 87. It has 87A, but not 87. I'm figuring out that this relay is on all the time, but when the control side is activated, it turns off. It is a 4 pin relay. The part # is FOOCLE FLS820-012-1B. There are absolutely zero that show up on a google search. The 1A & 1C show up, but not the 1B. Ironically, the others are 5 pin. On the front of the relay, there is a white tag that says: Red 12V DC White Relay control Yellow Pump A Blue Pump B I'm trying to use this relay to control a coil to a plug, for a Plasma spark ignition demonstration. I'm using a 12V DC LED strobe light controller to energize the relay, to simulate breaker points to fire a spark plug. This one is a head scratcher.
Can we not use the no 30 when using it for auxiliary light just to supply only the no. 87? Like I'm connecting the 85 to ignition switch and 86 is in the negative? And let the no 30 and 87a alone.
@@bernardocisneros4402 You can connect 85 to a switch so you can turn on the light 86 you can connect to ground 30 you can connect to B+ battery 87 you can connect to auxiliary light
@@konstantin-big But they don't want to use 30 and 87. Why use a relay if you're not going to use 30 and 87. You're better off using a butt connector and just using the ignition switch. You should always connect 85 to ground and 86 to positive side of control circuit. It will work the other way but it's technically incorrect. The next mechanic will assume 85 is connected to ground because that's what the standard says.
@@bernardocisneros4402 I am a car electrician I have been in the profession since 1974 If you use a relay then you haven't Voltage drop, and you can use a small switch to energize the relay
I have this 5-pin relay that operates the electric chute deflector up and down on my Kubota snow blower. It is located under the hood but for some reason I keep getting water in the relay case and shorting the relay and causing parasitic drain on the battery. Any suggestions on how to eliminate the moisture in the relay case? It has me baffled because this is the only relay that has this problem. TIA
If water is getting in terminals 85,86,87, and 30, you can pack that with dielectric grease. If water is getting inside the coil housing, then apply RTV around the seam between the coil housing and relay body.
I'd say most ECU's would use grounds to control the relays, that's how all of the aftermarket ones i've used worked to control the fuel injection for instance because they aren't designed to have high amps passing through them.
This works sometimes: bang on relay. I had a horn relay that would not work. So I disconnected battery. Tugged, poked, whacked and shook relay. Would not come out. Read it had to be replaced with whole relay tray, or cut out. Hooked up battery to call it a night and presto it worked. I guess it was just stuck with a little corrosion. If does it again I'll drill 3 tiny holes in the top and spray silicone spray into relay to possibly fix corrosion issue for long time.
Question my battery cable end keeps coming loose alternator changed funs fine for a month then bam everything dies battery was 13 when started alternator shows 15 amps im getting so upset paying all these people to fix my car the battery end is not the normal ends that most vars have please help 2011 3.6 chevy Malibu ltz any help please
Man you break it down so well. Thank you.. okay but check this out I got high on PCP and took a hammer to my ignition fuct off everything my ignition signal sticks, basically smashed out everything from the steering wheel to the tilt lever. I'm left with a bare steering column a wiring harness for my ignition switch with one red wire in a cluster of wires what's a clip. Thankfully the clip is intact and I believe that's to my ignition switch. But I got to get the hell out of here so how do I start my car. I can send you a picture that's what I'm dealing with if it makes it easier for you to help me with s*** please help😮
Finally someone who explains in detail how relays work and how to test them. Thanks a lot, appreciate it!
I'm glad I ran across your video. I tried watching other videos and reading how-tos. None of them made sense to me as they weren't explaining how the relay works. They were only showing how to test with whatever relay they had on hand. It didn't help at all. After your video, I can test my relays in seconds and now that's I know how they work I'll never forget this how.
My thoughts exactly! Have played with automotive electrical for decades and never understood relays. Not anymore.
Ive been wrenching for 10yrs and been avoiding electrical testing. Time to take it head on as I'm doing lots of repairs as a side job for extra income. Once i master my diagnosis skills my price is going up!
Let's call it a 'consultation'.
Thanks. You explained the 87a which the other videos didn't make as clear. I ordered a repair manual. I hope the wiring diagrams are helpful. Getting prepped so when my starter doesn't turn over next time I can see if bypassing the relay will work and start to narrow down my problem.
You can even use a flat 9 volt battery and perform the tests. It worked for me. Excellent video man👍
This was a great and simple explanation of how relays works and how to troubleshoot if the relay is good. Thanks. Keep it up.
Thanks!
You bet! Glad we could help. Thanks for watching and thanks for gift.
Best relay testing video on the internet!❤ Thanks for sharing this.
Wow, thank you! That's why we do it. Thanks for watching.
Watch half a dozen of these, and yours is the one that worked for me. Thank you.
This video goes straight into favourites,
thanks Tim, and take care.
That’s great to hear. Thanks for watching
Relays and solenoids are considered high current switches a lot of people are unaware of this. Yes the control side 85/86 is switched by the computer most times in an automotive application. Great video and I love that meter.
Great stuff man.. Thx!! I am sitting here at my desk with my fluke and power supply feeling like an absolute Genius thanks to you..
The best and most complete explanation I've seen. Thank you.
I been wanting to learn the process and this was an excellent video. Thanks!
Some one said, why he talks so much. If you really want to learn something. Then listen to the whole thing. Anyway I loved the video. Now I know how to check relays. Thank you so much for your time.
So glad i found this video. I finally understand how relays work. Thank you
This is just superb. Well explained nothing unnecessary and to the point. Thanks.
This actually sense to me now. I still have questions and some confusion as to why a relay works for a short period then stops. However I now can begin going back through my system
Thanks for sharing, it's helping get out of the rabbit hole.
Great video, I always knew what a relay did just didn’t know how it did it Thanks for talking in layman’s terms.
100% clear explanation.
Appreciate the video. This is what I struggle with at school. I understand it now.
Great video. I was looking into buying a new multimeter and this new one with chargeable battery and the auto feature looks amazing and only being 40 something dollars on Amazon is a great buy. Thank you. I'm buying one now.
Super helpful ! Extraordinary detail !! I learned lots !!! Thanks mate !!!!
Thank you so much for the clear and easy tutorial.
My only quibble is that it's not a resistor between 85 and 86, it's a coil that, when energized, creates the magnetic field to pull the relay switch to close the 87 and 30 contacts.
Some relays have a resistor across 85 and 86 to mitigate the destroying effects of a back EMF spike. Some relays even use diodes instead of resistors
Great video guys. I learned alot and got more understanding on the subject. Thanks Much
I had a little understanding of relays, when I tried to add fog/driving lights on my '72 Toyota Corolla & a little background in electronics. However, I never completely understood what the numbers stood for & exactly which terminals did what, even though I successfully wired the lights. Now, as an old guy, you helped really understand. Thanks!!!
I'm in the exact same situation. Took electronic classes in HS and learned more in the army. Being in my late 50s, I am finally a pro with relays. Lol.
I didn't have a 12-volt battery so I used a 12v battery tender for power. It performed both tests perfectly without worrying about damaging the relays.
This was really cool - I would love to see more about this. Specifically how you walk through a real problem when it's not some major component like a relay or a fuse.
I'm dealing with a fuel pump that's not working. Motorcycle sat for 8 years with fuel in the tank so I knew I needed to replace it. Since I was already in the tank, I replaced everything previously in the tank....the fuel pump, pressure regulator, fuel filter, float sending unit, all fuel hoses, wiring harness. Now the problem is when I turn on the ignition, the pump still doesn't sound. I added 2 gal of gas and still nothing. I even made a long hook so I could manually change the float sending unit and the level on the fuel gauge didn't change.
SO I'm thinking it's not getting any power to the pump. Fuses were fine - I checked the continuity and they're great. Changed both relays cuz they're old and cheap....still nothing. NOW I'm going to have to test the voltage at the relay and walk it forward but I don't know exactly how to do that. I'm also thinking I should check the plug on the outside of the tank that delivers power inside the tank. However I tried doing that but I'm honestly not sure if what I'm seeing is what it should be. It's confusing when you've never done this stuff.
Diagnostic question maybe answered from this video. I had clicking lights in the interior and windshield wipers. They drained my battery. I am going to try this now! Thanks for the great video. Easy to understand
Amazing video. 😊
Electrical on cars is simple. At least the basics are. 😊😂😊
Wow, professionally explained and quite informative 👏👏👏👏
Sir, YOU make this video easy to watch. your teaching mannerisms are most helpful. thank you for breaking it down to my level. great stuff. I subbed based on this video.
Excellent Video, great explanation of Relay functions. Love the test board and your Stainless Table to write on . Great Camera angle also 🙏God Bless You.
thank you for your video it been a big help
Thank you. That was a very good demonstration of those types of relays.
Best explanation ever . Thanks a lot
Very nice presentation with model straight to the point an extremely easy to understand thank you so much.
Great video! Smart and thorough! 5 star rating and thumbs up!
Great job letting us know about them explanation went a long ways
Thanks a lot
Best video on relays I have seen yet. ❤l
very good demonstration, made me understand, great guy!
This was a great video. Thank you.
I’m wondering…can you then reverse and remove a component from this? If it’s a 5 prong feeding a faulty antitheft system preventing a vehicle from starting, can we eliminate the system and put a four prong to bypass?
Loved this video show something how easy it is to test relay before replacing in a wrong way
Thenk you for the video is helpful God bless you.
Love this explanation ❤️💯
Very clear
Good Testing！ Very helpful for me
Very thorough! Thanks so much!
thanks a lot...and the key is infrequently review and/or practice this application in order to retain it... peace
Great video my friend. Well put. Maybe some more specific examples as used in the switching process' in the car would really embed the learning. Knowing there is a high and low side is key, but how they interact in the different automotive situations ( indicators, pumps, etc ) exactly wouldbegreat, but maybe that video would be too long!
Super video, I'm ordering the crocodile clips!
Can I just use a spare 12 volt mower battery with some alligator clip wires to energize the relay while testing? Do I risk damaging relay? GREAT video and explanation
Great video on electrical relays
Outstanding, well done!
awesome video sir!
Great video!!! Very informive!!
Great video, informative on to work with relays.
Wow... Thank you! Amazing video
Great video. Thank you
thanks so much for valuable information my car can now start, it was showing all those symptoms
AWESOME VIDEO!👍🏽🇺🇲 AND THE MOST HELPFUL IN EXCELLENT DETAILS! 👌🏽🇲🇽 YOU EVEN BOTHER TO GIVE US ADVICE AND LINKS ABOUT MULTIMETER THANKS A LOT MAN!
🇲🇽🤜🏽💥🤛🏼🇺🇲
Thank you sir for the help
You're very welcome. Glad we could help. Thanks for watching.
Excellent, excellent video.
Between 85 & 86 you refer to it as a resistor. It’s actually an electromagnetic coil that pulls or releases the pivoting contact point, right? I’m sure has resistance, but it’s not a resistor in typical electronics terms. Great vid though!
See the answer I gave to @fix135 above. In addition to that, a coil is made of of loops of wire and wire has resistance, so technically it's also a resistor.
Nice! For us who enjoy mechanics but not so much electronic
Awesome video! Amazing how such a simple thing doesnt have such easy to understand videos such as yours👍👍
Excellent video. You are a great teacher.
Glad it was helpful!
Thanks for de info 👍🏻grts from Belgium
thanks so much, that was valuable information
Excellent informative video thanks. Excellent info and great explanation!!! Thank you!.
Very thorough, Great video. What does it mean when the 87a across 30 open and giving numbers jumping up to 6.7? Does this mean that it’s a bad relay?
Nice vid!
Thank you very much.
Thanks Buddy that's helped me a lot 👍
Great information 😊
Thank you
so useful!!
Because of the way you explained how to test a 4 pin and5 pin
relay, I believe that I will be able to test a few relays on my
1999 GMC Sierra truck. I noticed that you used a 12 volt
battery with two short wires plugged into it. Where can I get
a battery and the two short wire pieces from? I see that I can get
the set of wire leads with the alligator ends attached from amazon.
Super helpful ! Thanks..
Great video
I tried to verify my headlight motorcycle relay everything was good until i tried to power it with a 12v parkside battery, when i touched the terminals with the wires it shorted… was the relay bad or did i do something wrong
I put a wire to 86 on relay and - on battery and another wire on 85 relay and + battery
You did everything right. Just a coincidence. Unless it was a 6 volt rated relay.
@@bernardocisneros4402 thank you for your reply, it wasn’t a 6 volt relay, i took it off my motorcycle, i guess i am just lucky :)
Excellent informative video thanks
Helpful but you did not include anything on the last relay type the thin rectangular one. The one I needed that has no numbers marked next to the pins. So I cannot figure out how to check.Any suggestions on what kind of video might have that. What type of relay should I search for? Again helpful but never got to the last one. Shown but not mentioned or discussed so I am clueless on how to fix. If you can please advise. Thank you.
He said if the prongs line up its 85 and 86 the other prongs are the 85 and 30 the 85 86 are the low side the 85 and 30 are the load side.
Great job 👍
Go to test power across 85/86 and pop, smoke, awesome!!! Going to guess that's complete junk now. Thanks👍🏻
Great video! May I get to know the model of your multimeter?
Good job
Hmm. I've got relays that don't have 87. It has 87A, but not 87. I'm figuring out that this relay is on all the time, but when the control side is activated, it turns off. It is a 4 pin relay.
The part # is FOOCLE FLS820-012-1B. There are absolutely zero that show up on a google search. The 1A & 1C show up, but not the 1B. Ironically, the others are 5 pin.
On the front of the relay, there is a white tag that says:
Red 12V DC
White Relay control
Yellow Pump A
Blue Pump B
I'm trying to use this relay to control a coil to a plug, for a Plasma spark ignition demonstration.
I'm using a 12V DC LED strobe light controller to energize the relay, to simulate breaker points to fire a spark plug.
This one is a head scratcher.
Stumbled upon your channel. Very cool episode, learned something I’ve always wanted to know about. Thanks a bunch! Subscribed!!
Helpful, thanks for that vedio
Can we not use the no 30 when using it for auxiliary light just to supply only the no. 87? Like I'm connecting the 85 to ignition switch and 86 is in the negative? And let the no 30 and 87a alone.
No, because terminal 30 is what provides power.
@@bernardocisneros4402
You can connect 85 to a switch so you can turn on the light
86 you can connect to ground
30 you can connect to B+ battery
87 you can connect to auxiliary light
@@konstantin-big But they don't want to use 30 and 87. Why use a relay if you're not going to use 30 and 87. You're better off using a butt connector and just using the ignition switch.
You should always connect 85 to ground and 86 to positive side of control circuit. It will work the other way but it's technically incorrect. The next mechanic will assume 85 is connected to ground because that's what the standard says.
@@bernardocisneros4402
I am a car electrician
I have been in the profession since 1974
If you use a relay then you haven't Voltage drop, and you can use a small switch to energize the relay
I have this 5-pin relay that operates the electric chute deflector up and down on my Kubota snow blower. It is located under the hood but for some reason I keep getting water in the relay case and shorting the relay and causing parasitic drain on the battery. Any suggestions on how to eliminate the moisture in the relay case? It has me baffled because this is the only relay that has this problem. TIA
If water is getting in terminals 85,86,87, and 30, you can pack that with dielectric grease. If water is getting inside the coil housing, then apply RTV around the seam between the coil housing and relay body.
You can change the position of the relay so that water does not enter the relay
U saved me today like thank u
I'd say most ECU's would use grounds to control the relays, that's how all of the aftermarket ones i've used worked to control the fuel injection for instance because they aren't designed to have high amps passing through them.
Well explained..
Luke Sywalker with a goatee.- lol 😀
Excellent info and great explanation!!! Thank you!
This works sometimes: bang on relay. I had a horn relay that would not work. So I disconnected battery. Tugged, poked, whacked and shook relay. Would not come out. Read it had to be replaced with whole relay tray, or cut out. Hooked up battery to call it a night and presto it worked. I guess it was just stuck with a little corrosion. If does it again I'll drill 3 tiny holes in the top and spray silicone spray into relay to possibly fix corrosion issue for long time.
Thanks for this video, with your help I think I just found the reason for my car not starting. 🎉
Great to hear! That's why we do it. Thanks for sharing.
Question my battery cable end keeps coming loose alternator changed funs fine for a month then bam everything dies battery was 13 when started alternator shows 15 amps im getting so upset paying all these people to fix my car the battery end is not the normal ends that most vars have please help 2011 3.6 chevy Malibu ltz any help please
great job ....... thank you
Good job.
Thank you a great video
Man you break it down so well. Thank you.. okay but check this out I got high on PCP and took a hammer to my ignition fuct off everything my ignition signal sticks, basically smashed out everything from the steering wheel to the tilt lever. I'm left with a bare steering column a wiring harness for my ignition switch with one red wire in a cluster of wires what's a clip. Thankfully the clip is intact and I believe that's to my ignition switch. But I got to get the hell out of here so how do I start my car. I can send you a picture that's what I'm dealing with if it makes it easier for you to help me with s*** please help😮