Fog light trigger help!

[HoferTheGopher]

I bought 2 lights bar from rigid to go in my tow hooks. Here is what I am planning, I will wire the lights to power off the battery, yet I only want them to turn on when the fog lights do. I don't want to splice and steal power from the fogs, I want them to be independently powered but triggered by the fogs. I am not too sure how to wire it up though. Any help would be greatly appreciated! Thanks!

[LongrangeLauber]

Led bars don't pull enough amps to go through all that trouble. If it were me I'd wire it in with the fogs. But if you want it powered from the battery and activated by the fogs then you'll have to get a relay harness

[HoferTheGopher]

I know that the fogs pull 2.5 amps each, and the light bars pull 2.9 each. Would that be too much for the circuit if I just spliced them off the fog lights then?

[Jdkno]

All you have to do is tap the fog light + wire to trigger the relay. Going from memory on a SPST relay, 12v from battery to pin 30, pin 87 out to the foglights, trigger wire tapped into fogs to pin 85, and pin 86 gets grounded. This way your fogs pull power directly from the battery and the stock fogs act like the switch.

[Spurshot]

All you have to do is tap the fog light + wire to trigger the relay. Going from memory on a SPST relay, 12v from battery to pin 30, pin 87 out to the foglights, trigger wire tapped into fogs to pin 85, and pin 86 gets grounded. This way your fogs pull power directly from the battery and the stock fogs act like the switch.

This is a great way to go. No wires to pull thru the firewall. Combine this with my mod for fogs on with high beams by using a diode to jump the 10-18 pins, and you'll have full control with your high beam switch or fog switch. It's the best combination of control I could imagine. Your high-Lo beam lever will turn on the fogs (and any other lights relayed to them) and dim them with the flip of the OEM hi-Lo lever. No scrambling around flipping multiple switches all over the place when an oncoming car comes over a rise. Or you can also turn on the fogs and other lights relayed to them with the OEM fog button.

 

I have my driving lights wired this way and have found them to be extremely convenient to turn on and especially easy to dim everything at once with the OEM hi-Lo lever.