Was the ignition on?

 

Truck is running.

 

Pulled what knob out? Mine have not worked since I owned it, never pulled a knob out though.

 

headlight switch knob pulls out to activate fogs but only if you have the OEM option

 

I couldn't figure out for the life of me why my fog lights wouldn't turn on until I dusted off the cobwebs and found this thread. Saved me a headache.

 

The button or headlight switch on the dash.

That is out and the indicator light is on.

 

Thanks. I'll try that lol

 

Buy a test light, find the output from the switch and see if there are 12vs... if yes, go to the lights and check all the connections for power.

 

Any idea the path the wire takes from the switch down to the lights?

 

Any idea on what the path is the wire takes from the switch down to the lights? (out the firewall by the switch and across the engine bay, snake behind the dash and out the passenger side, etc?)? I'm trying to troubleshoot mine too. Worked before I put a full replacement bumper on but now lights don't work.

 

it's the blue wire in this diagram

 

Just asking, but is there a relay in the fog light circuit? :dunno: