I'll check and repost here.
If I understand correctly you want to wire your Cobalt OEM. Here is C2 pin-out where you will find the fog relay control pin "C3".
Thanks for the quick help, can I just wire the power to the four plug fog switch by the dash?
I assume so, I had the same harness which was from a corvette and it also had two extra wires(don't know which colors). Although I did not ground them, only tapped them(which now I should have probably tried). When I changed my harness to the corvette, my car wouldn't spark but everything else worked on it. Anyways I just switched back to my regular harness, one without fogs relay and wired my fogs to the fuse. I fitted the wire into the "C3" and nothing worked. So I just wired it to my running lights so I can turn them off when I turn out all my lights.ok, so, i'm working on this. I installed fog lamp wiring into my light harness and connected to pin D5 in C3. I bought the wrong year harness. so, I just removed the fog lamp wires (purple and black) and inserted them into my existing harness and grounded accordingly. I didnt cut any wires and I've grounded in the proper locations. I got everything back together but the fogs dont come on. My car had the wiring connector in the dash but my car didn't come with fogs originally. My fog switch lights up. I have checked the underhood fuse panel for a fuse. It was already installed. I pulled to fuse to ensure it was good. Its good.
Do I need to install another wire from the fuse panel in the console to the underhood panel ?