My fog lamps have been acting up. When I turn them on, the indicator light comes on, but sometimes only one of the lights will come on, sometimes neither. If I go around front and push them in I can usually get one or both to come on. This has been going on for quite some time. Bulbs, fuse, wiring-which is the most likely culprit?

 

I would say bulb connector. Do you have the factory size bulbs in there ?

 

Get some electrical contact cleaner. My truck did the same thing and now it works just fantastic.