Hey all, new guy to the forums, I hope this question is too far out of line. I have a 2001 Dodge Dakota Sport 4x4, this is my first vehicle that has ground side switched headlights.
I want to wire them so that in order for them to be turned on;
1) a toggle switch has to be on, and
2) the high beams have to be on.
On my old Dakota that wasn't a problem as the headlight system was positive side switched.
A relay has 4 connections, power in, power out, ground, and the trigger, I believe that I need to do the following:
1) main power supply from battery to relay
2) + output from relay to lights
3) + trigger from toggle switch to relay, other side of switch connected to + power
4) - from high beam to relay ground
Now, in theory if either you turn off the high beams which will remove the ground from the relay or turn off the toggle switch which will remove the + trigger, the driving lights will go out. Is this correct? this is my first ground switched vehicle so I just came up with this setup in my head, not sure if it will work. Any recommendations greatly appreciated.
Actually, that's easy- you won't need to do anything really special, since you can take a signal directly from the headlamp itself. Find which wire is hot with high beam- that is where your signal will come from. From there, to your toggle switch. From your toggle switch to either 85 or 86 on the relay. The other one
(of 85 or 86) to ground. From a battery source to an appropriate fuse to terminal 30 on the relay. Terminal 87 to your lamps. Don't try to overdrive the relay- if you need a second one for amperage capacity, do it.