How To Wire A Relay - Quick Tip

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QUICK TIP: This is a portion of my larger "Relays Explained" video. In this quick tip we look at how to wire a 12V Automotive Relay.
See the full video here: • Relays Explained - How...
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#hotrodhippie #relay #relays

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28 сен 2024

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Комментарии : 181

@HotRodHippie 3 года назад

This video is an excerpt from a larger video explaining Relays in Depth. Check it out here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Xt0lC8mjJRI.html

@stevencarter7999 3 года назад

Man this is the best video I've seen on relay wiring. Simple and straight to the point. Thank you.

@CPguyinON 3 года назад

Agreed

@HotRodHippie 3 года назад

Glad to be of help. Thank you!

@keepnitsharp Год назад

Agreed! Finally someone who will speak on my level. Thank you sir!

@raymondsotosr2204 3 года назад

Best advise I have come across yet no BS just straight to the point and clearly explained Thank You

@amjad1203 3 года назад

Today on 14 February 2021, my old car's relay was not working. I saw your video and able to restart the vehicle with 4 pin relay instead of 5 pin. Good and nice video. Thanks

@groovyschmoops6911 Год назад

Thank you! I learned about relays last evening trying to troubleshoot why my motorcycle 🏍️ would not start. We tested the relays with a multimeter and alligator clamps. Luckily, the wires on the negative battery terminal loosened up. Once we snugged them up the ignition switch got power. Thank you!!

@victordragano8863 2 года назад

Excellent! No nonsense videos and very well explained!

@KableTac 3 года назад

this is hands down the most informative relay video on youtube when it comes to actually wiring everything up and it working correctly. if i could give you more likes i would in a heartbeat.

@dusterdude225 3 года назад

Been following you on tiktok for a while and your video is the first to come up when I’m trying to figure out how to wire my fan relay thanks for the help

@HotRodHippie 3 года назад

Glad to be of help and thanks for the follow! 👍🏻👍🏻

@saint3v Год назад

Dang bro finally some normal human dialect

@paradox7578 4 года назад

*Why does this guy look like Abraham Lincoln*

@ikigai47 3 года назад

must be the tats

@bigmedge Год назад

* Martin Van Buren

@TrippleNine666 Год назад

He teaching sum sum bruh some mechanic history’s

@travisstamp7428 Год назад

Learning wiring from somebody that died before electricity was invented 😂

@Marshdweller 11 месяцев назад

This isn't your mom's Abe Lincoln.

@lethal_anxiety_2609 3 года назад

This was very helpful, thank you!..

@RedPillDosage 2 года назад

Thanks you for a simple and easy to understand explanation. 👍🏽

@nelsonleonard4862 4 месяца назад

Thanks body...I own "Benz Gang Auto workshop" From today u be my teacher...

@aaronsimpson8410 Год назад

Clear and concise. You could be a lawyer . Well done

@BenKleinCreates Месяц назад

Do you have a video showing installing a relaying to a battery with a fuse? I understand adding a relay to battery but not adding a fuse. Thx for the helpful vids!! Working on adding a relay to lithium batteries in my golf cart (48v lithium battery -> fuse -> relay -> 12v converter -> 12 way fuse box for accessories)

@wildimpo Месяц назад

Nicely done! Question for a high volume fuel pump does it matter 30amp or 40amp relay?

@hush22performance1 3 года назад

Thank you for this video!

@TRIVICbuilder 3 года назад

Thank you. Easy to understand.

@HotRodHippie 3 года назад

Glad it was. Thanks.

@rwarts5150 26 дней назад

I needed to lengthen the relay switch ground wire on my off road lights and after I did that the lights don't work I used the same gage wire only 5 inches longer

@rexracer537 11 месяцев назад

Thanks for the video 🙏. Very well explained 👍

@infoman6314 4 года назад

Thanks a million

@davidsteen2777 Месяц назад

I have a side-by-side CanAm UTV with a 12V battery. There is a power distribution terminal under the dash that will energize when the ignition is on (there's a ground lug near by as well). Also, there are color coded wires passing through the firewall from this location directly to where the battery is located. I wish to provide power to my stereo, light bar, whip lights, back lights and rock lights via this distribution terminal using rocker switches. My question is this: will this be too much for this terminal and should I use an individual 30 or 40a relay for each device? Also, regarding the stereo...if I use a relay, can I jump 87a to 87, so when the ignition is off the stereo can stay on, or is there a better way of doing that? I can would manually turn the stereo off when not in use. Thanks for your advice in advance!!

@jamescooksey2885 Месяц назад

Can I run a second switch so a dash switch on the relay and another on the device I am powering?

@christomict12 3 года назад

Looks like Doug De Murruo's badass brother

@MR_UNOoo 2 года назад

HEY HONEST ABE ..WHAT if your wiring a momentary switch such as a convertible to switch..

@chadm6805 2 месяца назад

What if the switch I am using is a factory ground switch?

@cornbeef 2 года назад

Thanks for explaining everything I needed to know if two and a half minutes! Honestly, we need more videos like this ( I appreciate you have a longer one, but this was all I needed for now!)

@ianwilliams1448 2 года назад

Helpful stuff... Can a 5 pin relay be used as a 4 pin relay? If so, what terminals do I then use please?

@P0LAB3AR 9 месяцев назад

So on a two prong momentary switch where do you then send power and or ground

@davidmckinley5343 2 года назад

I have a 74 Barracuda and I recently installed electric fans. I'm having trouble locating a place to connect to the ignition power source. Any suggestions in the engine bay?

@tblizzy5603 2 года назад

If you’re powered switch wire is activated by 9 V,which is strong enough to activate the relay, you have 12 V going into the relay from a battery for the power. would you have 12 or 9 V coming out?

@GManKeepsltReal 2 года назад

What is that blue unit and how much power is it supply….does it need a ground?

@jesusrios9634 6 месяцев назад

Thank you so much for this video man

@ChrisDoesWhat 3 года назад

Very Good Video, Thank You!

@joshasmus5799 2 года назад

I'm assuming if my relay has a fuse built in I wouldn't need one on the wire as well.

@maxespinosa02 4 года назад

I’m going to be wiring my switch side from the negative feed(85) on a 4 pin. 86 would still need a 12v power source right? So could I just add it to a fuse block? 30- battery main source 87- whatever accessory power source 86- fuse block? 85- negative /ground switch

@HotRodHippie 4 года назад

87 should be whatever accessory you want to control. 87 is where the power from 30 goes when the relay is activated. 86, yes should just be a fused power source as you are controlling the relay on the ground side (85). Relays are low amperage draws 1/2A. So a small fuse in line or a low power source in the fusebox should be fine. 👍👍

@azentioced9 4 года назад

thats where he fucked up not telling us that we need a fucken live wire to 86 fucked my whole day up i just done what he said tell ya

@marte1a256 10 месяцев назад

What two wires go to the switch? The switch needs to have two wires coming out of it. Sorry if you demonstrated it and I didn’t catch it. I am totally blind. I understand everything else perfectly.

@Berghiker 3 года назад

Can I use the same battery for both outputs on the relay for 2 different circuits? I did this but the relay keeps clicking. It can't stay on.

@HugoCarrillo-mz4sp Год назад

How yuo connect 7041-R1A 5 pin relay

@knight3131 3 года назад

Hello I have a 4 pin relay 30 amps,, i'm using a fuse tab with 7.5 amps fuse to be the trigger. The ground of the relay can it be connected to the negative of the battery or it has to be grounded so the body of the car?

@titolove7677 9 месяцев назад

Thanks for the video

@ChiSokchea 2 года назад

Good video brother

@ErikRocha_cnvr 3 года назад

Great video

@jaybozios6891 4 года назад

What if I wanted to add lights to my f150 grille that automatically turned on when the headlights came on? Instead of adding a switch, would I just splice that wire to the headlight wiring?

@HotRodHippie 4 года назад

You’d splice into your headlight wiring with a Relay yes. If it were me I’d send power to the Relay on terminal 85 (ground on 86 or vice versa) and that will activate the relay to power your additional lights.

@jaybozios6891 4 года назад

@@HotRodHippie ok thanks. So 87 will be the wire splicing into my headlights?

@HotRodHippie 4 года назад

@@jaybozios6891 no 87 is the wire that will go to your new lights to supply them with 12v Power. 30 is your battery supply for your new lights. 85/86 are your “Control” wires. So one of those splices into your existing headlight wire (and the other goes to ground).

@jaybozios6891 4 года назад

@@HotRodHippie Ah ok got it. Thanks.

@johansanchez7512 Год назад

Good video

@paulnotdownunder3172 2 месяца назад

Is this Doug Demuro's brother?

@lowcountrytrooper 3 года назад

What voltage tester are you using? Thanks

@HotRodHippie 3 года назад

Do you mean the one in this video? That is the Power Probe 3. A Voltage tester / Circuit Tester that can provide Power and Ground to your circuits: amzn.to/3jr43UB Lately I've been using my Snap-On Triton Scan Tool's Scope Functionality for any serious voltage testing needs. Its rather overkill but gets the job done well. That I... can't recommend for the price.

@jeffreydavis4041 4 года назад

I am wiring a 50 amp trolling motor, I want a low amp switch to turn on and of power to the unit. I wonder do I need a 50amp 4 pin relay ? Or can I use a lower amp relay.....

@HotRodHippie 4 года назад

To my knowledge those are usually just wired with a circuit breaker(50A). I can't quite picture using a relay to wire one since the controls of a trolling motor are usually built into the motor, aren't they? If you do wish to use a relay, I would not feel comfortable with a 50A unless it specifically stated it was rated for a sustained load. I'd want a little head room on the rating personally. Some motors can spike over their rated draw for short increments. Or I could see using a Trolling Motor wide up for long enough periods to be concerned. Hope this helps.

@azentioced9 4 года назад

so why go to a switch power with the white wire? why not join it to the red wire its power? same as finding another power supply this is the part i am having a problem with

@HotRodHippie 4 года назад

Andrew Wiseman because then the relay is just always On. A Relay is a control device, it is basically a switch that can handle a heavy load. So a switch that never turns off serves no purpose. The circuit on 85/86 has to have some control of its own so it can turn off and on the relay. So there needs to be a switch or something to activate and deactivate the relay.

@HotRodHippie 4 года назад

Andrew Wiseman you can join the “white wire” to the Red but then there has to be a switch on the Ground for the control circuit. That’s acceptable as well and often how relays on modern cars are wired.

@azentioced9 4 года назад

@@HotRodHippie hello yes i got it now tell me if this is correct 30 to bat with a fuse 85 neg 87 goes the the lights now the white wire is 86 it goes to a switch other side of the switch goes to live with a fuse thanks

@HotRodHippie 4 года назад

Yep you have got it.

@azentioced9 4 года назад

@@HotRodHippie well thanks and sorry for saying what i did cheers

@anonymousperson4363 Год назад

85 and 86 does matter if a diode is used.

@mahendradhungel8011 6 месяцев назад

I have found the famed mandic really😊

@ionmarius6652 3 года назад

Hi can you please help me to use a relay? do u have contact adress?

@HotRodHippie 3 года назад

Head to my website and you can find a contact form: www.hotrodhippie.com/links

@josemeza7755 4 года назад

👏👏👏👏👍

@mr.blackhawk142 2 года назад

FREAK ALERT!!!! ^^^

@rick-kx7gy 11 месяцев назад

I always thought it was the ground that was sent ( not power ) to switch the relay .

@OsceolaFoodForests 2 года назад

extremely helpful thank you

@paulhuneryager4538 4 года назад

This is a fantastic video and great explanation of how this relay works. Question, is it possible to have this relay ( or a different relay ) to send the ground instead of power? Some circuits I work with have ground as activation. Thanks in advance!!

@HotRodHippie 4 года назад

Absolutely. You just wire your ground circuit through the relay instead of power side. In the same way, it doesn't matter if you control the "control" side of the rekay with Ground or Power switching. On the "Power" side the relay doesn't care what is happening, it's just completing a circuit. Thank you very much. 👍

@paulhuneryager4538 4 года назад

Perfect!! I just did as you suggested and it works flawlessly. Thanks for your prompt response and enjoy your day!!

@ox_mage2562 2 года назад

@00:30 is literally the only thing i've needed from any link or youtube video and you seem to be the only one that directly lays it out, that I've seen -> THANK YOU!

@JonNichols2112 4 года назад

You're saying 30 goes to battery and 87 goes to whatever device your connecting. I'm looking at a diagram for a motorcycle stereo amp and its showing the opposite..87 to battery and 30 to the amp. ???

@HotRodHippie 4 года назад

It technically does not matter. I explain it that way because if someone has a 4 or 5 Terminal relay, either way what I said is correct. 30 is ALWAYS correct. Whereas 87 isn't ALWAYS correct. But to fully explain that would be at least a 5 minute video of it's own that few people would actually watch. On a 5 Terminal Relay 30 Provides power to either 87 OR 87A. So if I said "It doesn't matter which way you wire it" the 87A terminal wouldn't be able to serve its purpose if someone had that Relay and had a use for it. The Relay doesn't care which way power Flows but I was trying to avoid confusing some people by not over-explaining every facet of the matter. This is only a snippet from a larger video explaining How Relays work as a whole, so you may be missing quite a bit of context here.

@ronliebermann 2 года назад

Many years ago, I had a job which involved the installation of electronic temperature controllers. Each digital controller was connected to a pair of heavy-duty relays, which were used to energize heating coils for restaurant ovens. The wiring of relays in any type of machine is a pain in the neck because all of the wiring has to be routed, and then secured, and then tested. It’s time consuming. But actually, there’s no reason that relays should have to be wired on the low-side. They only need to be wired on the high-side where the current flows. So if you wanted, you could make Blue Tooth relays. They would receive commands from a Bluetooth-enabled output, such as an electronic temperature controller. That would cover the low-side, which would then then open and close the power circuit. A Bluetooth chip nowadays costs less than a dollar, so it wouldn’t increase the cost of the relay, and as a benefit the technician would no longer have to run low-side wires. That should reduce labor costs.

@vansonmafeet734 Год назад

Does it matter if you mount the relay to metal inside the engine bay for good ground point connection? Or is it okay to mount it anywhere else?

@RSTEM Год назад

That's the question I'm here for

@NC750X 4 месяца назад

I just followed what you did and blue my relay up 😢

@soulcrushrez2855 4 месяца назад

Wait really how

@avproductions5184 Месяц назад

So, I have very limited electrical experience and would like someone’s opinion on a project I’m working on. I’m putting in under dash lights in my car. I want these lights to turn on when the car door is opened AND when the ignition of the car is switched on. I plan to accomplish this with a simple relay. I’d plug the battery into #30 (via a constant fuse tap) The lights (LOAD) into #87 The ground for the relay into #86 And then I’d use 2 different sources for the signal on #85 One signal would come directly from the dome lights that turn on when the door is opened. The other would come from a fuse tap from the accessory which only receives power when the car is on. Of course this means that sometimes both “signal” currents on #85 would be sending power at the same time as there will be times that I have the door open and the car on at the same time. Will this work or am I missing the point of a relay entirely?

@donadams7469 3 года назад

just what I was looking for you are my hero!!!! thank you I really rather wish when wiring in an after market radios and you don't have an ignition source this was the first thing to pop up... I've ended up double tapping the wire but then even when my radio is off it's still drawing power so I was just wondering about using a relay thank you very much

@davidsteen2777 Месяц назад

I possess a UTV...is it worth the time to install a relay to my sound bar? If so, if I provide power via my acc, can I connect 87a to 87 so I can have constant power with out having to turn the key on, or is that defeating the purpose?

@jasonsoutdoorsports8632 7 дней назад

Can I put the white wire to the remote wire on my amp in my vehicle so the fan will come on when I turn the car on.?? Thanks

@cory0702 5 лет назад

Cool dude you kept your word about making a wiring video. Thanks so much Sid

@HotRodHippie 5 лет назад

I can't always get to requests right away but I try my best. Thanks for watching and Commenting. 👍👍

@cory0702 5 лет назад

Hey it was fast enough, I'm sure I'm not the only person looking for a better understanding. I dont want to fry my challenger srt with some half ass wiring. Thanks again

@moptop85 5 лет назад

S.A Design books 160 & 209 are worth getting. I hate electrical work but I will rewire my next build myself instead of buying a aftermarket harness.

@EzanaFasil-n8w Месяц назад

Is it safe to power fuel injector relay from another relay....ecu pulse is weak to fuel injector car won't start

@dbsmusic9270 2 месяца назад

What size fuse to use in the inline fuse? Trying to power a 12v 16 Amp Radiator Fan

@groovyschmoops6911 Год назад

Alan! Thank you for the info! Question for ya- did you tattoo the palm of your hand 🤚🏽? That’s so cool. if you did what is it?

@kucingrockmix9716 5 лет назад

Awesome video..can you make a video how to add relay in reverse camera diagram for car? Thanks..

@HotRodHippie 5 лет назад

I don't see making a dedicated video about that. However if you want to email me I could discuss it or maybe draw you a diagram of it. Alan@hotrodhippie.com is the email.

@kucingrockmix9716 5 лет назад

@@HotRodHippie ok..will email you soon. I'll draw first my diagram and then send it to you for correction

@SidePocket008 4 года назад

I have a 2011 chevy silverado LS and I got a new headlight switch that has the fog light button on it so I can turn on some after market fog lights. I found the fog light fuse in the fuse box and was going to use one of those add a fuse to hook up the lights to. Should I go directly to the lights from the fuse box? Or is there a way to use a relay with the fuse that is switched? Hope I worded this so you understand what I am trying to do?

@HotRodHippie 4 года назад

Check underhood in that fuse box, there may already be a Fog Light Relay present. If there is you'll likely just need the Fog Light harness and to splice in your lights. A lot of modern vehicles come wired for the accessory options, just minus the components themselves. When I used to work at a dealership we commonly did Fog Light installs on vehicles that didn't come with them and that was ten years ago. I'd check into that first. If you don't have the components necessary then check back with me and I'll try and walk you through it. 👍

@SidePocket008 4 года назад

@@HotRodHippie There is a relay there already from the factory, And I did find a video on how to wire to that relay but I don't know what type of pin connector I need? for the harness. And the guy just stuffed the wire up in it and I don't want to do it half ass'd like he did. So I was going to just go from the fuse with one of those add a fuse things directly to the lights. The fuse is a 15amp and I already tested it and it has no power until you hit the switch. And can you recommend a good amber fog light?

@darrylm3627 3 года назад

Good Stuff & Great Tips 👍 Thanks!

@Daves_adventures4315 4 месяца назад

Dude, Dave’s adventures 4315 channel. Totally thank you for explaining this to me thank you thank you thank you. You kept short you kept it sweet you didn’t try to blow it all out of proportion thanks man. Thank you so much.

@mrpushpendersingh3996 Месяц назад

Sir ye relay kitne rupaye ki or kaha pr milegi

@SoundzAlive1 2 года назад

Very well done for a novice like me. Funny thing is they don't tell you the basics on the relay. I did not know the pin outs were stamped on the pins so the diagram was meaningless. Also, the diagram does not relate to the position the pins are. Thanks again.

@nomadsteve5297 3 года назад

You are a hero, thanks

@jkyoft78 2 года назад

I asked this on another of your videos, adding it here too: I want to add a kill switch to my 2021 Nissan NV 200 (small cargo van). I don't want to kill the battery because I want the security system to remain functional. So I thought a fuel pump relay kill switch would be good. However, auto shops around here won't do it...they say adding a kill switch would screw up the CAN bus. Scotty Kilmer (youtube guy) says the best way to prevent car theft is to just remove the fuel pump relay and take it with you. Sure, but that means I would need to open the hood, open the relay box, pull the fuel pump relay and take it with me...and when I got back, open the hood, put it back in. But I was thinking...would it be possible to relocate the fuel pump relay into the dashboard? Place an extender-type socket device, pass thru socket device, from the relay box in the engine compartment and run wires thru the firewall into the dashboard, to a pass thru socket which would accept the fuel pump relay? This way, I would just remove the fuel pump relay without having to open the hood, etc. There would be added distance that the signal would need to travel, say 6ft. But basically, I would have everything be a pass thru to the regular fuel pump relay which happens to be in the dashboard now. What do you think?

@josegarciaatencio7274 3 года назад

Can anyone help me out. I am trying to power my reverse lights. They are 2x2 pods. I want them to power up when I put the truck in reverse. But I already have a switch to them which I control manually. Is it possible to wire this in order to get both things working. When I put reverse they go on directly. And if I want them on just because I can use my switch already installed. Appreciate any help.

@ParabellumX Год назад

Holy $#!%... I have been struggling trying to find out how to control the LEDs on my Ninja through a relay. Thanks, bro. 😏

@rexlu580 Год назад

Thanks for your explaination, mate, but just a quick question, how to connect 85 86 if I don't need a swith for control circurt ? just leave the 85 and connect 86 to ground ?

@HotRodHippie Год назад

There is always going to be a switch. If you just wire it Hot all the time the device it is controlling will be hot all the time. On a car we'd generally call it "Key Hot" because the ignition switch IS your switch for the relay. That is generally how a fuel pump is wired. There is still a control switch, just not a switch on the dashboard or whatever.

@rexlu580 Год назад

@@HotRodHippie Thanks mate, but I just wanna install an Anderson plug for my caravan's fridge, is that ok ?

@beakfish7319 Год назад

So.. ive run a 32 inch led lightbar off an eom switch that is fused but its not run off a relay... and my oem switch has burned out twice now. I need a relay dont I? Im very new to this stuff. Lol

@HotRodHippie Год назад

Yes you absolutely need a relay in that situation. Use the switch to activate the Relay & let the Relay handle the load / switching on of the light.

@beakfish7319 Год назад

@@HotRodHippie solid! Thank you!

@adamnasher944 Год назад

Thank you very much sir

@hassibassi4484 4 года назад

I have three pin relay that is battery, horn and switch. In which terminal I have to connect the switch wire in my dual horn wiring?

@LEGOCAMARO Год назад

Grate vid lots of useful info. Random question but do the holds in your ear affect hearing any?

@eugeneanderson7984 5 месяцев назад

Thank you

@ShaneWarrington 5 месяцев назад

Thank you

@c2k911 2 года назад

Difference between 87 and 87a please?

@HotRodHippie 2 года назад

Check the Full Video this was a clip from for a full breakdown and explanation, the information you seek is there: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Xt0lC8mjJRI.html But the long and short of it is, 87 is your "Switched" circuit. It receives power when the Relay is Signaled to turn "On". 87A is the "Normally Closed" circuit. It turns OFF when the Relay is signaled on but is receiving the connection when the Relay is NOT energized and is just sitting there.

@mickjohn332 3 года назад

Thanks buddy for getting it fkin said in English and fkin simple. You da mang hammer

@yrigoyen0108 2 года назад

Thank you!!!!

@mikekomin1772 2 года назад

Thank you

@kabandajamir9844 2 года назад

So nice

@bigsteve7ft Год назад

sweet . thanks that helps and nice quick video.

@joes.1945 Год назад

So we'll explained! Thank you!!!

@allpaulsfault 2 месяца назад

Best relay video on RU-vid

@vextrek6036 3 года назад

Excellent video. Well done.

@albertfortier3471 2 года назад

Thank you for this info.Awesome

@danny1smith 3 года назад

Why would you use a relay instead of just going straight to the positive and negative with a switch and fuse?

@HotRodHippie 3 года назад

Most Switches aren’t rated for anything more than 10A. Switches that are get to be large and cumbersome, as well as ugly. Relays are rated for 30 or 40 Amps in the common design shown. Some can go even higher with different designs. Also you can often run a shorter wiring run with a relay. Say you have an Electric fan on your Radiator and your battery is right next to the radiator. Do you run wires from the battery, to the switch inside, then back to the Fan? Now your 20 Amp fan is pulling 20Amps through 12 foot of wire vs, 2 foot if you’d wired right from the battery to the fan with a relay. Often this means needing even larger sized wires to make that extra distance. Also now you have a wire running extra distance pulling 20 Amps. That’s a lot more chances for it to chafe and ground out. This was a small excerpt from a longer video explaining what Relays are and why they should be used: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Xt0lC8mjJRI.html

@vagabond3045 4 года назад

So if I use a really 30amp for my electrical fuel pump what size fuse should I use online with battery

@HotRodHippie 4 года назад

That is entirely going to depend on the fuel pump in question. Most aftermarket pumps list what size fuse to use in their instructions. Maybe range from 10-30A so I can’t really say off hand.