@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!
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!)
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
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
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.
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!!
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.
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
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.
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)
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
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!!
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?
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 ?
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.
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?
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!!
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. 👍
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?
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?
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?
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. 👍
@@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?
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?
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
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
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. 👍👍
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?
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.
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
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.
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.
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.
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: th-cam.com/video/Xt0lC8mjJRI/w-d-xo.html
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.
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?
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 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).
Great video man,i have a question if i may,im working on my car doing some rewiring on some lights and im following some instructions that are on the internet. Now this is not a fly by night thing, this was put together by a knowledgeable person and people have used it with perfect results however something i noticed is that there is a wire thats fused that needs to be installed directly from the battery (or solenoid) for power that goes to 87 on the relay (according to this article), most ways to wire a relay ive seen, they use number 30 like you say,why would these people use number 87 and is that acceptable in some cases? just wanted to add this is a 4 pin relay not 5 and when i said fused i meat your supposed to install fuse in line on that wire for protection but yes they have it wired to 87 for some reason,im just curious,if it works that way im happy too.
I mean in some cases that method will work. But not all. I’ve seen relays with Diodes inside which prevent back feeding of power. So if you had one of those relays, unknown to you, you’d not be able to send power back from 87 to 30. Most likely that article was written by someone who hasn’t run into that issue. Honestly I haven’t either but I always wire from 30 to 87, so I wouldn’t run into it anyway. In the end it would “work” but isn’t really right. It was probably someone who has done it that way forever and sees no issue with it cause it’s always worked for them. I try to teach things to prevent the few issues that could pop up. 👍🏻
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.
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. ???
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.
Check the Full Video this was a clip from for a full breakdown and explanation, the information you seek is there: th-cam.com/video/Xt0lC8mjJRI/w-d-xo.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.
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.....
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.
These relays are rated for 30A (or sometimes more) but no Terminal 30 is just terminal 30. Maybe it is why they picked that but some relays can be 40A or 50A and still use the same diagram.
In the first half of the video you say the blue wire is the power out and the red wire is to the battery in the second half of the video you flip it over and it’s the opposite am I not understanding this
This video is an excerpt from a larger video explaining Relays in Depth. Check it out here: th-cam.com/video/Xt0lC8mjJRI/w-d-xo.html
Man this is the best video I've seen on relay wiring. Simple and straight to the point. Thank you.
Agreed
Glad to be of help. Thank you!
Agreed! Finally someone who will speak on my level. Thank you sir!
@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!
Best advise I have come across yet no BS just straight to the point and clearly explained
Thank You
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!)
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
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
Glad to be of help and thanks for the follow! 👍🏻👍🏻
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.
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!!
Excellent! No nonsense videos and very well explained!
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.
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
Best relay video on TH-cam
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.
This was very helpful, thank you!..
Thanks body...I own "Benz Gang Auto workshop"
From today u be my teacher...
Clear and concise. You could be a lawyer . Well done
Thank you for this video!
Thanks you for a simple and easy to understand explanation. 👍🏽
Thanks for the video 🙏. Very well explained 👍
Thank you. Easy to understand.
Glad it was. Thanks.
Nicely done! Question for a high volume fuel pump does it matter 30amp or 40amp relay?
So we'll explained! Thank you!!!
sweet . thanks that helps and nice quick video.
Dang bro finally some normal human dialect
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)
*Why does this guy look like Abraham Lincoln*
must be the tats
* Martin Van Buren
He teaching sum sum bruh some mechanic history’s
Learning wiring from somebody that died before electricity was invented 😂
This isn't your mom's Abe Lincoln.
Cool dude you kept your word about making a wiring video. Thanks so much Sid
I can't always get to requests right away but I try my best. Thanks for watching and Commenting. 👍👍
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
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.
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?
That's the question I'm here for
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!!
Helpful stuff... Can a 5 pin relay be used as a 4 pin relay? If so, what terminals do I then use please?
What size fuse to use in the inline fuse? Trying to power a 12v 16 Amp Radiator Fan
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?
Grate vid lots of useful info. Random question but do the holds in your ear affect hearing any?
Thank you so much for this video man
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?
Can 87 also be the switched power source or do I have to add an additional toggle switch to be at the close circuit 86?
Good Stuff & Great Tips 👍 Thanks!
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 ?
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.
@@HotRodHippie Thanks mate, but I just wanna install an Anderson plug for my caravan's fridge, is that ok ?
Thanks a million
Very Good Video, Thank You!
Holy $#!%...
I have been struggling trying to find out how to control the LEDs on my Ninja through a relay.
Thanks, bro. 😏
Thanks for your help 😊
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?
thank you Mr. Lincoln
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
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!!
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. 👍
Perfect!! I just did as you suggested and it works flawlessly. Thanks for your prompt response and enjoy your day!!
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?
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?
You are a hero, thanks
Thanks buddy for getting it fkin said in English and fkin simple. You da mang hammer
I have 12v 40a and it is safe to use 5mm I think is 8awg cable from battery to relay then use 22awg cable from relay to reverse camera ?
Thank you for this info.Awesome
HEY HONEST ABE ..WHAT if your wiring a momentary switch such as a convertible to switch..
What is that blue unit and how much power is it supply….does it need a ground?
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?
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. 👍
@@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?
Well explained 👍
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?
Excellent video. Well done.
Good video brother
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
Great video
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
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. 👍👍
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
Good video
Thanks for the video
What if the switch I am using is a factory ground switch?
So on a two prong momentary switch where do you then send power and or ground
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?
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.
Is it safe to power fuel injector relay from another relay....ecu pulse is weak to fuel injector car won't start
Thank you very much sir
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.
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?
That was helpful thanks
Thanks man great help.
Randall Guess glad to be of a help 👍🏻👍🏻
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
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.
@@HotRodHippie solid! Thank you!
Awesome video..can you make a video how to add relay in reverse camera diagram for car? Thanks..
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.
@@HotRodHippie ok..will email you soon. I'll draw first my diagram and then send it to you for correction
I'm assuming if my relay has a fuse built in I wouldn't need one on the wire as well.
Finally, git'er done!
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.
So if I use a really 30amp for my electrical fuel pump what size fuse should I use online with battery
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.
Nice video
Why would you use a relay instead of just going straight to the positive and negative with a switch and fuse?
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: th-cam.com/video/Xt0lC8mjJRI/w-d-xo.html
How yuo connect 7041-R1A 5 pin relay
Thank you!!!!
Thank you
What voltage tester are you using? Thanks
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.
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?
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.
@@HotRodHippie ok thanks. So 87 will be the wire splicing into my headlights?
@@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).
@@HotRodHippie Ah ok got it. Thanks.
Real Bad Ass ink on the Adams 🍎 👾
Great video man,i have a question if i may,im working on my car doing some rewiring on some lights and im following some instructions that are on the internet.
Now this is not a fly by night thing, this was put together by a knowledgeable person and people have used it with perfect results however something i noticed is that there is a wire thats fused that needs to be installed directly from the battery (or solenoid) for power that goes to 87 on the relay (according to this article), most ways to wire a relay ive seen, they use number 30 like you say,why would these people use number 87 and is that acceptable in some cases? just wanted to add this is a 4 pin relay not 5 and when i said fused i meat your supposed to install fuse in line on that wire for protection but yes they have it wired to 87 for some reason,im just curious,if it works that way im happy too.
I mean in some cases that method will work. But not all. I’ve seen relays with Diodes inside which prevent back feeding of power. So if you had one of those relays, unknown to you, you’d not be able to send power back from 87 to 30. Most likely that article was written by someone who hasn’t run into that issue. Honestly I haven’t either but I always wire from 30 to 87, so I wouldn’t run into it anyway.
In the end it would “work” but isn’t really right. It was probably someone who has done it that way forever and sees no issue with it cause it’s always worked for them. I try to teach things to prevent the few issues that could pop up. 👍🏻
@@HotRodHippie if I may would you mind if I explain in detail my situation? Maybe you can steer me in the proper direction
@@dntlss sure, email me and I’ll do what I can, when I have time.
Alan@HotRodHippie.com
@@HotRodHippie Man thats awesome thank you.
Looks like Doug De Murruo's badass brother
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.
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. ???
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.
So nice
Difference between 87 and 87a please?
Check the Full Video this was a clip from for a full breakdown and explanation, the information you seek is there: th-cam.com/video/Xt0lC8mjJRI/w-d-xo.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.
Great thanks
I just followed what you did and blue my relay up 😢
Wait really how
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.....
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.
Does the 30 mean 30 amp?
These relays are rated for 30A (or sometimes more) but no Terminal 30 is just terminal 30. Maybe it is why they picked that but some relays can be 40A or 50A and still use the same diagram.
In the first half of the video you say the blue wire is the power out and the red wire is to the battery in the second half of the video you flip it over and it’s the opposite am I not understanding this