How To Test and Diagnose Relays and Wiring [4 & 5 Pin]
ฝัง
- เผยแพร่เมื่อ 22 ก.ย. 2022
- Relays and wiring can be a real pain, and the whole process of testing and diagnosing can be daunting. If you simplify it and break it into pieces, it's not all that bad. We show you some simple ways to diagnose a relay and confirm whether it's alive or dead. You'll definitely want a multi-meter, some jumper wires, and a 12-volt source. Let's get started.
Kaiweets Multimeter: amzn.to/3xL0fG4
Alligator Clip Wires: amzn.to/3C7pvZI
High Amp Alligator Clip Wires: amzn.to/3R79Bmb
Keep current with our great content:
TH-cam: / shoptoolreviews
Instagram: / shoptoolreviews
TikTok: / shoptoolreviews
Facebook: / shoptoolreviews
Twitter: / shoptoolreviews - ยานยนต์และพาหนะ
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.
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
You can even use a flat 9 volt battery and perform the tests. It worked for me. Excellent video man👍
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..
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!
This was a great and simple explanation of how relays works and how to troubleshoot if the relay is good. Thanks. Keep it up.
The best and most complete explanation I've seen. Thank you.
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.
This is just superb. Well explained nothing unnecessary and to the point. Thanks.
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.
Thanks for sharing, it's helping get out of the rabbit hole.
Awesome video! Amazing how such a simple thing doesnt have such easy to understand videos such as yours👍👍
This video goes straight into favourites,
thanks Tim, and take care.
That’s great to hear. Thanks for watching
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.
Super helpful ! Extraordinary detail !! I learned lots !!! Thanks mate !!!!
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.
Excellent info and great explanation!!! Thank you!
Thank you. That was a very good demonstration of those types of relays.
Best relay testing video on the internet!❤ Thanks for sharing this.
Wow, thank you! That's why we do it. Thanks for watching.
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.
Appreciate the video. This is what I struggle with at school. I understand it now.
Best explanation ever . Thanks a lot
Loved this video show something how easy it is to test relay before replacing in a wrong way
I been wanting to learn the process and this was an excellent video. Thanks!
Very nice presentation with model straight to the point an extremely easy to understand thank you so much.
Great video guys. I learned alot and got more understanding on the subject. Thanks Much
Excellent informative video thanks. Excellent info and great explanation!!! Thank you!.
Very thorough! Thanks so much!
very good demonstration, made me understand, great guy!
thank you for your video it been a big help
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.
Thanks for de info 👍🏻grts from Belgium
Good Testing！ Very helpful for me
Best video on relays I have seen yet. ❤l
Excellent informative video thanks
Excellent video. You are a great teacher.
Glad it was helpful!
Great video on electrical relays
Super helpful ! Thanks..
Thank you for the video, exelent.
Excellent, excellent video.
Great information 😊
Thank you
I GET IT !
B/C If your relay is good there might be a problem somewhere else !!!? THANK YOU !!
Great job 👍
Well explained..
great job ....... thank you
Thank you a great video
Thenk you for the video is helpful God bless you.
Great video
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
Nice! For us who enjoy mechanics but not so much electronic
Awesome thanks 🙏
Good job.
Yeah man great video
Amazing thanks a lot.
U saved me today like thank u
Nice vid!
Thank you very much.
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
Thanks so much.
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?
great thank you
85 & 86 is the coil. That operates the relay.
One of them has to be grounded for it to work eather as a power source or a ground source
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
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.
Awesome presentation! Question? Where did you get the leads for the 12 volt? Thank you.
Harbour Freight Tools I think carries them or Amazon as alligator test leads or cables
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?
Thanks!
You bet! Glad we could help. Thanks for watching and thanks for gift.
I am testing a 1733 5 prong relay. I measured the 85 tp 86 and it measured 74. In the video you said it should be 75 to 100. DOes that mean my relay is bad? My other test showed OL. I did not test with power since I did not have a power source handy. Thank you
Thanks
Pity the link to Amazon for the multi-meter says unavailable. A very good video explaining relays.
Thank you sir
Welcome. Thanks for watching.
👍🏽🇺🇸👍🏽 very helpful
Awesome, glad you think so. Thanks for watching.
Absolutely appreciate your explanation and hard work. I have a question that no one has been able to answer for me. I have a 20A fuel pump fuse that blows as soon as I hit my push/start button of which obviously doesn't allow me to start my car. I replace the fuse and as long as I don't try to start my car it doesn't blow, giving me the chance to check my plugs that go to my fuel pump module and the actual plug for my fuel pump under my back seat. I have power running to both plugs, continuity is fine and my fuse is still good so where is the fault at in this situation thanks in advance?
Starter short?
Filter is clogged. Pump should be pulling 10 amp max
thanks
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😮
😮🎉😮🎉😮🎉---😊,
WOW! Thank you so much for taking the time to make this video too inform me about the routes electricity takes when ground/12 volt / 85/87A/420/69 etc .. ..... .. .
My experiments haven't been as fulfilling as I know they were many moons ago. Installing these relay switches inside of the cranium of two species of saltwater fish. I could not get the wiring correct from the electrical brain diodes running to the tail then to the relay fuse and of course it grounded to a hollow bone in the jaw. Then wired to the fins, and from the fins to the 12 volt battery installed exterior of the scales. I couldn't tell you how many salmon I use for practice and I had very neat effects/ movements on command, forward left right and even reverse. It isn't a very good backup job reversing for the fish but it tries even though it doesn't know what it's doing. sounds out of the voice box ( fish don't have specialized vocal cords or larynx's so the most popular way is through a tribulation, the same way crickets makes sounds the fish rubs two phones together or clicks producing audible 112 decibels mimicking music or songs that are being played through underwater sonar speakers. And of course all the tones are in the range of the eardrum that the earthworm grows naturally.. But everybody knows that. (The unnatural eardrums have never worked going back to 19 63 when Klaus Schmidt revolutionized the hearing aid affects/quality for the endangered scouts that were trapped inside of the cave during the mining accident in Mexico. I digress
🤔 I lost my concentration where was I.....
Oh yeah! So I got the huge fish wired up with the relay on the interior of the cranium with the 12 volt battery that is securely placed on the dorsal fin. With no holes or anything drilled into the fish because the last thing I would want to hurt would be the beautiful beautiful experimental fish.
If anybody would be interested in the conclusion of the first round after this kind TH-camr gentleman taught us all about relays, I'm happy too provide my link to the science paper that is peer-reviewed by my peers at the institute.
I have a 97 Camry fan 4 pin relay Bosch. Has no 87 but listed as 87a? It seems to be working when tested with a multi-meter and 12 volt source but my relay testers is saying its bad.
What is the acceptable resistance rating on a Wehrla 21164-12 volt Part #911.615.108.01. Mine is reading 60.7?
where'd you get that auto meter i need to get one for my brother im a plant maintenance technician but he's a tree surgeon and i need to find a meter like that for him
I have been trying to find out what should be a simple question, everyone talks about primary and secondary. my Honda Coils has two spade connections one is blue/ green the other is black which one is primary? And what wire connects to it, live or signal.
I tested the 4 pin glow plug relay 103 of my car, the resistance is 64 ohms. Does it mean that the relay is bad? Need to be replaced?
Keep thanks
Nice video. Nissan horn not working. Good fuses and 12v on one blade plug. I tapped on horn relay and got it to work for a split second. Then nothing. Then the horn worked shortly thereafter for 1 night.
I've got a 3-blade Nissan horn relay. I can energize two blades and it clicks, but only in one direction. When I energize the two blades with a good 9v battery I measure about 4v on the output blade that goes to the horn. The 4v steadily decreases if I hold it on the 3rd blade and monitor it.
How do I confirm the relay is the issue? Thanks!
... if one has a out of production relay, could one just pigtail a more common 85/86 relay?
THANKS
You're welcome! Glad we could help.
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.
What about if brake lights stays on as I’m driving. I disconnect brake light switch and lights stays on
Great video...questi9n. So if there is power at 87a and 87 when powered that's a problem? Correct
Sounds like it might have failed inside and has fused the two circuits together. Pull the relay and ‘without power’ test to see if you have continuity between 30 and 87a and then 30 and 87. If BOTH have continuity, then they are somehow fused together and it is broken.
hi i need help i have a 1984 cheverolet p32 and the 5pin relay in your video is same as the one i have i looked at the wires the red goes to 30 and to the fuse box and white ground goes to 85 and green goes to 86 to neutral safty switch there was a yellow wire on 87 but was just cut 4 inches up i bought a new relay do i need another wire for this to work im not very good with electrical but im trying my best to get it running its a nice truck im trying to restore so any input would be greatly appreciated
LET'S GO TJ...☝️
Just trying to live the dream! Thanks for watching.
SO there is 12v power going to 86 & 30 simultaneously?
trying to fix my fog lights in my car they are aftermarket/oem. i know I need bulbs but why did both blow out at once?
Thanks for the help i have been trying to find out how to test my fuel pump relay on my 94 Chevy c1500 2wd 5.7L. i had a check engine code 54 to pop up and when I looked it up there was two different things that could be causing this code one was the fuel pump relay ( low voltage) or it could be a he EGR valve solenoid. Hopefully i can find out how to test the EGR valve solenoid hopefully it is something simple. But knowing my luck ( I ain't even going to say it, don't want to jinx myself ) but again I want to say thanks for your help)
If relay are melted together I should conduit on ohm meter? Right?
What if your not getting system voltage out of 87 after it is energised?
if you connect a blinker relay at the front from pin L to pin 30 + to switch relay and connect, for example, a bulb to pin 87 and 87a. will both bulbs turn on and off, of course, when both realys are connected to power
what if the 4 pin relay has nothing on it !,can power a pin to see if it clicks ? and i power the wrong one would it burn the coil in it ??
I use a power probe. And I am good with it. Can you explain some ways I could use a multimeter that may be better than power probe. I debating on buying a multimeter. Everything you did in this video I can do with power probe. But I feel like I need a multimeter. But what would I do with it if I had it. What can a multimeter do that the power probe cant
My Opel astra G 1.6 16v 2003 keep stalling even when I drive!
Relay keep clicking when ignition is On!
Could be the relays problem?
I'm trying to test a Toyota four-pin Electronic Fuel Injection relay which has no terminal numbers ... however I get 79 ohms off two pins when no power and only get it to click on/off when putting 9 volt battery to the same two pins. That doesn't seem right. Shouldn't it be the other two pins for power on/off? I get nothing from them. PLEASE HELP !!!
I watched the video again, my fault relay seems to be working fine .... so off to look for the real problem.
Great video BTW. cheers & thanks.