Hi, I have been having a problem with the fog lights on my 05 F-250 super duty truck. They won't come on when I'm parked but when I'm going down the road they'll come on and usually go right back off or will stay on for a min or longer but still sooner or later they go out. I think it's a shortage somewhere but I'm not sure on whether it's in the switch on the dash or somewhere in the wiring.

 

Do you have fog lights that use a ballast system?

 

Check/clean all the connectors. I would also replace the fuse, it could be corroded or broken.