How To Wire a 4 or 5 Pin Relay
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- In this video I show you how to wire a 12 volt automotive Bosch style relay. This video covers both 4 and 5 pin 12VDC relays.
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Yes, FINALLY a video that EXPLAINS a relay and where everything goes! Only one on TH-cam I'm pretty sure. 🤣
No shit, ive been struggling for days figuring out relays, and youre the only one that made it make sense.
I’ve watched 3 videos and NONE OF THEM MADE SENSE.
This is how you do it, thanks for the vid man!
Much appreciated!
Thank you very much!
I’ve been looking for a diy video like this to do my fog lights on my civic for 3 years now you broke down the steps like no other great job!
Glad the video could help!
Thank you for watching and taking the time to comment!
Best how to wire relay I've found. Thank you. The led drl's I installed on my 2007 Toyota Tundra caused me problems after 5 years. They came with a harness and tapped into the acc and headlight + so they would come on when the truck was started. I've decided to wire them to a switch in the cab so I can turn them on and off as I choose. I have to figure out which wires are which coming off of the harness. That shouldn't be too difficult. I already have the switch. Just need to get the relay and in line fuse. Thank you. I look forward to future how to videos.
I'm glad you found the video useful, thanks for watching and I wish you luck with your install! Keep in mind that some Toyota's use a "positive ground" setup for their lights. This meaning they don't use the positive wire on the switch, they use the ground on the switch and the power is on all the time. Some quick probing around with a multi-meter will tell you if yours is wired like this.
Thanks for taking the time to make this video!! Simple and straight to the point! Keep making videos Rocky and Great job!
Great little vid on a common subject that I needed to know and the first one that has the little side window showing the pin-out and the numbers associated with each wire, good job!
Thank you!
Rocky this is a great video, 5 years I'm sure you have upgraded your production. Redo this video with a good wireless mic! Help more people
Thank you so much. I have used 14 pin relays, but never a 4 pin automotive. Your video really helped.
Glad it could help, thank you for watching!
@@RockyXTV I am building a system for a guy. It's a surround sound system to be used outdoors at a drive in theater. He only wanted one switch, and the switch was rated at only 5A. I knew it would not be enough, especially since I am installing a huge 2.1 amp, and a voltage booster, that will power the amp at 48 volts. I used a 12 volt, 40 A relay. Your video was perfect.
If you get a chance, check out my channel. I will definitely be watching more of your videos.
Thank you very much ive seen like 5 previous videos and just didnt get how it works and you made it simple and very easy to understand people couldn't do it simple as this thanks.
Thank you very much! I'm glad the video could help!
This is the most helpful now I know it doesn’t need to be the ignition or something like that it can be a literal switch
Superb instructional. I had been looking for a video on how to marry a pushbutton light with a relay. the other videos watched were super confusing, You made it quite simple and understandable by not assuming knowledge on behalf of your audience. Thanks so much sir
The best example so far of how to wire up a relay, THANKS
excellent visual and verbal demonstration that brings it all together......well done
Thanks for checking it out!
Way easier how he explains it. Thank you very much
Thank you for watching!
Straight to the point & no B.S. Thank you for sharing the right way of hooking up relays 💯👊🏼 just subscribed 👌🏼
Hooked up a set of l.e.d. running lights to my harley road glide. After a near nuclear explosion and going crazy I found your video. Thanks to you I have nice set of fork mounted lights that look good and no melted wires or blown fuses or hot as F##$ resisters.
The animation you made for the video put the icing on the cake. Great video 👍
That was honestly the best explanation on how to hook up a relay and what the terminals are used for great work I am now subscribe to your Channel and just to let you know I watched over 20 relay videos
Best relay video I have seen. Thank you. I would like to learn how to use the middle pin not shown in this video.
Sure thing! I'll try and film a video explaining the uses for pin 87a. Thanks for watching!
Great explanation. Simply put and easy to follow and understand. Thanks
Thanks for checking it out, glad it could help!
3 years later and it is still the best video i have found so far!
I agree
Holy shit. I feel like I can wire anything with this info. I installed fog lights, HID lights, HALO lights, and even switched out my manual windows to power windows. I wired that up with this info. Never expected to add so many accessories. I need to make a relay box to make it look nice. Wires are everywhere.
It can add up quickly once you know how to do it. I'm glad the video could help. Thank you for watching!
Simple and straight>>>>forward! Thanks Bud!
Thank you for watching!
@@RockyXTV I wired my 4 pin relay to with the add-a-circuit adapter... my fog lights now work as DRL with my key ignition and engine 'ON' and switches 'OFF' when the key or engine is off... Thanks for the simplicity you used in communicating the concept - I owe my new skill to you! Cheers!
Glad your install went well!
I can't wait to get my freeway blasters mounted! Thank you for the refresher!
Hell yeah man appreciate this video quick and easy no bullshit straight to the point
Nice simple is always best to explain things like this
Fantastic job! Best relay wiring explanation.
Thanks for everything I been trying to get it to work for weeks now I got it with your help bro thanks
Excellent video
Followed all the steps and I got through 😎👌
I love Relays...!!!
I like your power supply....450 CCA..!!
Watching this video was really helpful, I'm just stuck on the part where it's grounded to. Do you not use the negative side of the battery at all? Can the Ground for the Relay and the light be on the same bolt? And is the wire to the switch from the battery positive?
thank you for sharing knowldge, the best video about those relays .
iam from libya.
Good presentation. Easy to understand keep it up bro
Thanks bro, all the way , from Belize.
Thank you for watching!
Plane and simple. Thanks.
Very informative nice video Rocky!!!
Thanks for watching Chad!
Thank you for your video works 100%
Thank you for watching! Glad the video could help!
i connected my light bar using exactly what you said with my own wire & it won’t work. any ideas ?
If you like, you can send me an email ( rocky.tvchannel@gmail.com ) and I can send you a diagram. That may help troubleshoot your issue. Thanks for watching!
So it is safe for the relay... to wire a switch and the signal wire directly to the battery? You don't have use a lower voltage?
No need to lower any voltages, it's all 12v. Just be sure to use fuses.
Thanks for watching!
I have a load wire from my ditch lights, where would I place that? Or do I cut the yellow load wire out?
So nice
Thanks for this great explanation. Only thing I am not sure is where did you connect the other wire of the switch. I saw you connect the other red wire to pin 86. Is the other wire from the switch to be grounded? Or because you also use a red wire, is it to be connected to any positive wire? Thank you
Thanks! Didn't know gauge in to amperage and that the space connector goes in directly 😅
Is it possible to wire tap into the power out. Ex the power out is going to the fuel pump when the ignition comes on but I also want to run another fuel pump. Can I just tap into that and ground somewhere else ?
Great video! Thank you.
Thank you for watching!
Awesome video!!!!!
Great Video.
Thanks!
Another question I’m hooking up aftermarket power windows can I use a negative trigger? the windows have a switch itself to go up and down I just need to hook a switch up so it’s not constantly draining while the car is parked
That should be fine, I can't say 100% though without being familiar with the system you have. If the aftermarket windows are draining your battery there may be an issue somewhere though.
@@RockyXTV it’s a aftermarket one off of Amazon I’m installing them just didn’t no how to power them so I thought I’d learn how to wire a relay. The relay will work I figured it all out now thanks to you and a few ppl here on TH-cam you guys rock thanks dude
@@RockyXTV was going to use a fuse tap but those can’t handle more then 10 amp and the aftermarket power windows kit is 30amp so the relay is the best for what I’m trying to do
Question, Can i use two different voltages? id like to run 12v as my signal into 86 but run 18v into pole 30 and out 87. Any ideas?
I'm not sure... I've never done it before. In theory it seems like it would work as long as the relay can handle the 18V. Pins 85 & 86 only control the electromagnetic coil which makes a physical connection between pins 30 & 87. So the 18V SHOULDN'T come in contact with the 12v on 85 & 86. I'm still not sure though.
If you do try it, make sure to let me know what happens, I'm curious now.
Thanks for watching!
I have a new relay that the contacts appear to be in a closed position with nothing connected. Is this normal? When I connect power, the contacts separate. Disconnect the power, the contacts close, the opposite of what it should be doing.
There are relays that function like this, but they are normally labeled as N/C or "Normally Closed" relays. 5 pin relays can function like this as well if you are using pin 87a.
How does it work with a positive earthed vehicle like a Toyota hilux?
Don’t know if you will see this or not, but should your accessory switch (which has 3 connectors) be grounded as well? I see you have your power hooked up, and the middle hooked up which I believe to be the accessory terminal but you still have a non connected terminal which I believe to be your ground. Did you forget to ground that or?
I read and reply to all comments, it's one of my favorite interactive things to do as a TH-cam creator. The ground for rocker switches is not required as it performs no safety function. The ground on the switch is for illumination, if your switch has a ground that means it can light up if you want it to, if not you just don't wire in the ground. Thanks for watching!
Really appreciate it thanks to you I now know how to wire a relay
You’ve saved my car from almost catching on fire
That would not be good. Glad I could help!
Thanks Rocky I was having trouble raping my head around the relay for my Electric fan with a switch
Thanks
Thank you for watching! Glad the video could help!
I HATE when my head gets raped too! I'm with you, Gregory. XD
(*wrapping)
Ho does this relay is necessary for 18w led bar?
I picked up a second factory fuse and relay box from a junkyard. Has most the relays and fuses but not all. I was going to hook it up to organize my current and future accessories. Any idea where I can get the terminals that the relays would plug into in that box and how much power those relays can handle?
The terminals are hard to find, I had to get a bunch a while back. Here's a link to the ones that have the little prong on them - www.amazon.com/Uxcell-Spade-Terminals-6-3mm-Connector/dp/B00UYUCXO2/ref=pd_sim_328_9?_encoding=UTF8&psc=1&refRID=J8RBDBE889H8CADJBSQY The prong is so they snap in place, as for the relays, most are rated at 30-40 amps each. Thanks for watching Alex!
I have a question, so I want to install fog lights my kit does come with a relay and 3 prong toggle switch. I am trying to avoid using a the switch. I want it to turn on when my headlights turn on. So obviously the switch uses ground, power, and 3rd I am assuming trigger. which wire would I use to tap into my headlight? Would I just get rid of the ground since that just lights up the switch, use the red power wire tap it into a fuse and white trigger wire attach that to the headlight power wire?
hi and i have a toy scooter which is 24v and i am using a litho 5ah battery...i have played and it will go but wants to reset as the amperance is too much ,,can i use the 12v relay method outlned here and this motor and controller uses lead acid but still seems ok if i dont try to ride myself 90kg ..do i use 2 relays or that would only need to be if i was paralelling 2 24v litoos cheers ..like your vid and keep up the wisdom as thats where us dabblers reside ta terry
You can look into some other relays as some are rated 12/24V I don't know much about the 24V side of things. If you are running at 12V and below 30 Amperes a standard Bosch style relay should serve you just fine. Thanks for watching!
I have a 2 pin harness how do i wire a relay to alternator
I have a question how do you make it keep blinking
I am installing pods as additional reverse lights. Where does 30 & 86 connect? Don't really have a switch per se if I tap it directly to the parent reverse light wire. Do you run the fused 30 all the way to the battery (+) terminal & 86 to the parent reverse light wire? I appreciate your time.
You are correct. If you don't want to use a switch it would be PIN 30= Battery, PIN 85= Ground, PIN 86= Reverse light positive and PIN 87 to your pod lights. Thanks for watching!
Thank you sir, YOU ROCK!! If you have the time, Can you give me your opinion on this video at the 11:37 mark?Slightly different configuration. th-cam.com/video/T1o29KTVbTE/w-d-xo.html
His way is also correct. backwards but correct. Pins 30 & 87 will always be used as power IN or power OUT for your light, they can be switched. The same goes for pins 85 & 86, one of them needs to be a ground and the other a positive "trigger" or "coil" wire in order to activate the relay coil and turn it on. In a few diagrams from years ago showed that you could wire relays in a somewhat backwards manner and they would still work. A lot of people picked this up as being the standard way of wiring relays. People learn how to do something one way and don't like to change I guess. The way I told you is the standard and "correct" way of wiring a relay in an automotive application such as yours. Their are other ways to wire relays for different applications as well.
That is what confused me previously. I did not realize pins can be switched. Thank you for the lesson & taking the time.
Is the switch connceted to positive terminal of battery to 86?
No it is not. The switch hot wire goes directly from the switch to the relay. The only wire coming from the positive of the battery is to pin 30 on the relay.
I mean.. If one side of the switch goes to 86, then the other side of switch will connected to?
Can i connect it with my ignition switch or park light??
I only saw on the video, one terminal of the switch to 86 and the other terminal i dont know where to tap it..
how did you power up the switch ??
A wire ran directly from the battery using an inline fuse.
hi please i need help with a tail and brake bike light, I need to use a relay for this can anyone help?
I’ve been watching a few videos like this and looks like the negative on the battery is not hooked to anything?
Does anyone know if this setup with a 12 volt battery would work with a 3 volt accessory? I’m trying to wire a garage door opener to the passing high beam button on my motorcycle. I just don’t know if the relay would prevent the battery from frying the opener. Thanks
You could use a relay with pin #86 wired to your passing switch, pin #85 to a ground then you would have to send only 3 volts to pin #30 from the battery in your opener, then back out of the relay via pin #87 back to your opener to activate it. This would use 12 volts to turn the relay on and off (pins 85&85) but would only pass the 3 volts through pin #30 to pin #87. I hope that makes sense. Thanks for watching!
Thanks so much!! Great video 🙏
Thank you for watching!
Great 🤘
Great video I'm trying to wire dual electric fan with 2 relays 2 breakers on my 74 Nova could you make a video or email me a diagram of proper method.?
Merry Christmas
Yazmin Venice Beach Ca 🌊🌊🏄🏄🏁🏁
Send me over an email ( rocky.tvchannel@gmail.com ) with what you have and how you would like it set up and I'll try to get you a diagram drawn up as soon as I can. Thanks for watching!
how to works 75a the middle pin on relay?
Pin 75a on a relay is a constant ON so to say. As long as you have Pin 30 wired up to power, Pin 75a will have power as well. When the relay is turned ON the power is taken away from Pin 75a and goes out through Pin 75. Then when the relay is back OFF, power will again go through Pin 75a and not Pin 75. I hope that makes sense. Thanks for watching!
Its a normally closed circuit passing power constantly
Can I Daisey chain that battery power to multiple relays(5)?
Best example I have found, really well demonstrated & simply explained. I have subscribed.
It is kinda ironic, because you normally use a relay to run a HIGH draw appliance with a LOW power switch. (I know it is a demo) Just sayin....
Excellent video. Some 5 pin relays have 2 X 87 terminals instead of 87 n 87a. Does that mean you can power Up 2 accessories at the same time?
Hella brand uses this relay design quite a bit, and yes you are correct. It is so you can power a pair of lights/accessories without having to splice them together.
There are many, many different types of relay so always look over their design if possible.
Yeah, thanks mate
Easily the best vid...total layman's terms even I understand it 👏👏👏👏👏👍
Nice! Can you do a tutorial on how to wire headlights ( high low beam) using two relays.
not on relay i have, 30 is black, 87 is red, middle is blue , 86 is yellow, 85 is white, makes no since to me, 30 IS NOT POWER on my relay, it is a black wire, so all this does is confuse me
I have changed all this , this is just colors it came in
This is the exact video I needed for my install. My accessory is a set of air horns, which is the only difference (to your LED). I do have questions though. My air horn set includes 2 compressors and 2 relays.Q1. Can 1 relay feed both compressors?Q2. If I need to install both relays can I run 1 power wire and 1 ground wire then split them to feed each compressor?
Depending on how much current your compressors are pulling you may be able to use a single relay, it needs to be less than 30 Amps for both compressors combined. If it's more then unfortunately you are stuck using two, or you can use a big HD relay like the one from another video of mine - th-cam.com/video/u-GXqTpICNM/w-d-xo.html For your second question, yes. Just be sure to use a heavy gauge wire. Thanks for watching!
But when your wiring a car you dont just have 5-10 or more wires ran directly to the battery. Its typically alot neater than that but how is this achieved??? Through the use of bus bars?
I'm a huge fan of using bus bars or battery terminal distribution blocks. I've also made my own waterproof switch boxes/enclosures (like an Spod) You're 100% correct that it would be much neater.
Thanks for watching!
If my accessories that I’m plugging in to has a 14gauge gauge power wire would i use a 14gauge wire to run from the relay Or could I use a smaller size wire from the relay to connect it ? That would be the yellow wire
Your relay should have numbers on its pins.
PIN 87- to the accessory/light/etc. This wire should be the same size as whatever came with said accessory.
PIN 30- to the positive on your battery. This wire should be the same or larger than the wire on your accessory.
PIN 85- to negative of your battery or any ground.
PIN 86- to your switch. This will send power from the switch to the relay coil to turn it on.
*PINS 85 & 86 can actually be switched and work just fine. As long as one is a positive and one a negative. These wires can be small as they are only used to activate the coil in your relay, they pull very little power.
*Relays can also be negative/ground triggered.
I hope your answer was in there somewhere. Thanks for watching!
So in the case of a light that goes out on a vehicle when something else turns on, is a 5 pin relay used for that? If so, how is that wired and what PIN numbers are used to turn a relay off when something turns on?
The 5 pin relay would be wire as such;
Pin 30 = +Power IN
Pin 87 = +Power OUT (when relay is ON)
Pin 85 = -Ground/Negative
Pin 86 = +Power from switch
Pin 87A = +Power OUT (when relay is OFF)
When wired up, Pin 87A will power whatever accessory hooked to it when the relay is OFF. Once the relay is turned ON, power is taken away from Pin 87A and given to Pin 87.
I'm not sure if I answered your question, or if that even made sense. Thank you for watching!
Hi I have problem whit my fog lights the switch turn on and the lights not I have a red wiring on the battery whit fuse and other wiring orange this one I check on the relay is don't have power when I turn on what you thing the bulbs all ok thank you very much
If you have power going to the relay, but not coming out of the relay it sounds like a bad relay. Try having someone turn the fog lights on while you stand near the relay. Listen for a click, if there's no click, then most likely the relay is bad.
Conventional flow is pos to neg (the way circuits are drawn), but electron flow is neg to pos (the actual flow of the current through the wire).....therefore the ground wire should also be able to handle the current!
With the help of this video I was able to wire three lights to two relays and one rocker switch. The lights came with a harness that was wired incorrectly.
I'm glad the video could help! I've seen a few improperly wired prefabricated harnesses, drives me crazy!
Thanks for watching!
My relay is numbered 1 through 5 . Anyone know how match them to the numbers shown??
I've never seen a relay numbered like that... I would think the pins would be in the same spots though, but I can't say this for sure. Honestly, I would get a different relay. I wouldn't put a lot of trust in a relay/manufacturer that didn't use the pretty universal standard pin numbers. Thanks for watching!
How do you do it, to have a ground wire switch, rather than a power wire switch.
It's actually pretty simple.
Wire pins 30 & 87 just like in the video.
Wire pin 86 to constant Power (+) instead of a switch, you can even make a jumper Wire and get the power from pin 30.
Wire pin 85 to a switch like in the video, but using your Ground (-)
Relays are very simple & can be used/wired in many different ways.
Pins 85 & 86 are used to "activate" the relay. It doesn't matter if you give it constant Ground (85) & "trigger" it with Power (86) OR give it constant Power (86) & "trigger" it with Ground (85) It will work the same.
I hope that all made sense. Thank you for watching!
Thank you! That's all I can say, you are a godsend my friend!!
Thank you for watching!
hi rocky X I want to wire a 4pin relay to spy 5000m alarm system there is one wire I want to connect throuhg the relay and it come out on the other side i was thinking 86 and it come out 87 is that correct.
If you had the other pins wired as follows you would be fine. PIN 30=12V+ PIN 85=Ground then you would be able to use PIN 86 as the trigger/coil wire and PIN 87 would be a 12V+ Output. I hope that answers your question, thanks for watching!
@@RockyXTV Thank you very much for your reply I am up all night searching and texting ppl and no reply.I want to connect something like this in this vedio th-cam.com/video/skXHO96M5f8/w-d-xo.html but he dont really show much and dont reply.the blue cable coming from the alarm i just want to put the relay in the middle so it dont damage my bike.
Also some diagrams show terminal 30 connected to 12V Ign rather than direct battery power. How's that?
That is a "standard" way of wiring in a relay. This makes it so you can only turn on that relay if your key is on, and also can't accidentally leave it on. I like the ability to turn on my accessories whenever I want, that's why I wire pin 30 directly to battery power. I hope that makes sense.
Thanks for watching!
@@RockyXTV noted mate. Thanks
Thank You !!!!.
What type of fuse you put there?.
I am installing 48 feet of LED strip tape
5050 SMD lighting actors the roof of my 53 ft. semi trailer I have all wire up..
Just need to work in an on/off switch.
I bough a Universal Relay and 1 inline fuse connector.. It did not come with a fuse... what size fuse should I install...
Please help me.....
Thank You !! 8.2.19 0941hrs.
Do you know how many watts your light strips are? Here is a simple formula you can follow to figure out what size fuse you need.
Watts divided by Volts = Amps (W/V=A) Example; you have a strip of lights that are rated at 65 Watts and your vehicle's operating voltage is 13.8 Volts. 65W / 13.8V = 4.71A. You would technically only need a 5 Amp fuse, but you want some wiggle room, in that scenario I would go with a 10-15A fuse. I hope that all makes sense, let me know if you need more help, thanks for watching!
@@RockyXTV Thank You Very Much !!!.
Your videos help me a lot... I really appreciated!!!
Thank you for watching and I hope you were able to calculate your fuse size.
Thanks for this tutorial, but I'm a bit confused. Which cable goes to the - pole on the battery? or is that the chassis ground? Maybe this is a very stupid question but my knowledge about electricity is very basic and I know that to make an accessory work you have to connect it to the
+ and - from a power source.
There is no need to connect the - to the battery itself. Pin 85 on the relay can be connected to the battery ground if you wish, but it is normally just connected as a chassis ground. Thanks for watching!
Just found this video and it is by far the best for visual and steps given. Thank you!!
Thank you for watching!
Is it not the function of a relay to facilitate as a 4-way flasher? Will that be in your next video?
That would be a flasher relay, in most cases. There are many uses for standard "Bosch" style relays. Thanks for watching!
@@RockyXTV Turn signal and flasher relays are usually within the same flasher. A flasher can flash one or many lights, depending on the wiring.
Finally someone that explained the relay wiring and demonstrated how to do it no more burning up wires on my J10 Jeep truck thanks a lot man.... live long and prosper ! !
Glad the video could help! It's good to hear you won't be burning up a J Series, I love those trucks. Thanks for watching!
Cool video. Question, how would a latching relay wire to operate 2 things off a main switch and deactivate with a 12v source? Thanks in advance.
I've actually been researching latching relays over the last few days. I still don't have all the info yet, but I plan on making a video about it. Sorry I couldn't help you right away, thanks for watching though!
I watched a few of these now and thanks, I really understood yours. Just a question though, the switch is not grounded, it is a positive + across the pins and through to the relay.
Im working on a on board air compressor project. If my 87 is hooked up to my compressor. Where would I hook up terminal 1 and 2 of my pressure switch? I have 86 as my toggle switch. Would I splice into 86?
Thanks bro. This is what I'm looking for. You are a day saver. Again, thank you very much.
Thank you for watching!
can you tap off the big IN cable with a small wire to going to the switch instead of running a whole new wire all the way back to the battery (I'm doing a 24 volt light bar). Don't want to have to run another wire back to the 24 volt battery
You sure can. Thanks for watching!
Why can't you just eliminate the relay entirely in this situation? Power to the switch then to the light bulb?
I was thinking to use a relay to install a set of DRLs to be constantly on, then tap into my parking light/headlight so when these turn on, the DRLs turn off.
Edit...maybe I didn't hear the part about not needing to run thicker wires from the switch to the light bulb?
I have a yaris 2024 and i cant find bcm pinout to put ambient lights . I want to power source them from battery 12volt and also put e delay relay that trigers from acc to open the leds . The problem with this is that the led will start only when i will turn the key . So i thought to take and another line from courtesy light . Is it possible to take the triger from 2 different sources ?