OK, I have a 07 LS without the factory wiring built in for the fog light swith on the dash. Was wondering if anyone knew what wires I would need to run where to make it work if I got the plug from the junk yard. Will be installing a new gm light harness with fogs to the fuse box under the hood.

 

Factory fogs are run through the BCM. It is much easier/cheaper to wire in a standard rocker switch instead and use relays to enforce the "turn off with high beams" rule.

 

Ya, I know it would be cheaper to go aftermarket, but I like a challenge. And I'm kind ****. Anyone??