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Ok so just adding in a relay on the reverse line will stop the feed back. I can just join the power leads from the reverse line relay to the power leads coming from the relay on the manual override correct?
Look at the circuit mrollings shows above. That's the right way to do it with two relays.
Or you can add a diode to the "Gary Walters" circuit you showed above (I said "relay" in my post above but that's not what I meant). The diode would go in the wire between the "reverse lights" (which would be the dome light in your application) and the relay. The diode will have a bar closer to one end. The end with the bar goes to the relay.
Guys...not trying to start an argument. I did this same thing on my 2018 to put in backup lights that come on when I shift into reverse or when I flip a switch inside the cab.
I used one relay, one new fuse, some wire, solder, shrink tube and connectors. There was no need for a diode. A very simple install, for my very simple mind.
If the OP used one relay he would turn on the dome lamp when using the auxiliary light switch.
Though, to be honest, he could simplify this entirely by having the aux lights turn on whenever the dome lamp is on. He would need just one relay, and use the headlight switch as the manual switch for turning on the aux lights. We've all been assuming that he want's to use two switches; the stock headlight, and a separate aux light.
It could be done with one relay and no diodes. Assuming a Bosch style relay, use the dome lamp circuit to operate the relay coil with the 85 and 86 pins. Supply battery + to the 87 pin through an appropriate fuse and fuseholder, wire your auxiliary lights to the 30 pin and add a switch for independent on/off between the 87 and 87A pins. Optionally, wire the on/off switch to provide accessory power to the 87A contact, but you will need to fuse this line separately.
It could be done with one relay and no diodes. Assuming a Bosch style relay, use the dome lamp circuit to operate the relay coil with the 85 and 86 pins. Supply battery + to the 87 pin through an appropriate fuse and fuseholder, wire your auxiliary lights to the 30 pin and add a switch for independent on/off between the 87 and 87A pins. Optionally, wire the on/off switch to provide accessory power to the 87A contact, but you will need to fuse this line separately.
Good idea! But a lot of Bosch-style relays have 2 "87" pins instead of an 87 and an 87a. So you need to make sure you have the right kind of Bosch relay.
No need to add a switch at all. There is already one in the dash. What happens when you turn the headlight **** counter-clockwise? Dome lamp turns on. What happens when you open the door? Dome lamp turns on. Run the relay off of the dome lamp, and you've satisfied all the requirements the OP has for his aux lights. No back feeding, and a minimum of parts required.
Guys I just wanted to draw it up to make sure it’s right please let me know if this looks right. Also where is my ground. I thought 87 and 87a were going to be the two different triggers?
This is how I wired up the backup lights on my 2018 Raptor:
I used a Hella 5 pin waterproof relay WITHOUT a diode.
Pin 87 - a new wire with fuse from the battery to the relay.
Pin 86 - a new wire from switch to relay
Pin 87a - a new wire from the back reverse lights at the trailer hitch plug, soldered and waterproof shrink wrapped
Pin30 - a new wire from relay to power backup lights
Pin 85 - connected to ground
Backup lights connected to ground
Guys I just wanted to draw it up to make sure it’s right please let me know if this looks right. Also where is my ground. I thought 87 and 87a were going to be the two different triggers?
No. That is pretty far off. I'm not sure what it would do, but not likely anything good.
Originally Posted by insufishentfunds
This is the way I thought it would have been wired, but after reading your post I’m pretty sure I am wrong
No. That won't do anything.
Originally Posted by Wheelman55
This is how I wired up the backup lights on my 2018 Raptor:
I used a Hella 5 pin waterproof relay WITHOUT a diode.
Pin 87 - a new wire with fuse from the battery to the relay.
Pin 86 - a new wire from switch to relay
Pin 87a - a new wire from the back reverse lights at the trailer hitch plug, soldered and waterproof shrink wrapped
Pin30 - a new wire from relay to power backup lights
Pin 85 - connected to ground
Backup lights connected to ground
Hope this helps...
This would work, but isn't how I'd suggest. The problem is that when the switch connected to pin 86 is off and the reverse lights are on, the backup lights connected to pin 30 are getting their power from the reverse lights rather than the fused wire (pin 87).
I'd recommend what NotEnoughTrucks suggested above:
Pin 86 connected to insufishentfunds' dome light (or to Wheelman55's existing reverse lights)
Pin 85 connected to ground
Pin 87 connected to +12 volts through a fuse
pin 87a connected through a switch to +12 volts (could go through that switch to pin 87 since it has +12 volts)
Pin 30 connected to the light you want to power
This will turn on the light if the switch is on or if the dome light (or reverse light in Wheelman55's case) is on. And it will always power the new light through the new fused power wire connected to pin 87.
Guys. I'm a non-expert at electronics. I am good at following directions. What I did was with my BACKUP lights. The directions were given to me by an electronics pro.
In the case of the dome lights, I would listen to what Bob (NothingSpecial) suggests.
Best of luck with the project and let us know how it ends up.
Nothing special, Sorry I guess I miss understood the first write up that not enough trucks wrote up but I will follow the wiring you just wrote I as i believe i understand it and I will post pics when its done thank you!
Nothing special, Sorry I guess I miss understood the first write up that not enough trucks wrote up but I will follow the wiring you just wrote I as i believe i understand it and I will post pics when its done thank you!
No problem. He wrote it in a paragraph. I just separated it out into bullet points. Different people see things in different ways.
Originally Posted by mrollings53
Just make sure the switch is rated to carry the load of the lights.
Good point. Most will be, but if you are using big lights (or a lot of lights) or a small switch it could certainly be an issue.
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