my fog lights stopped working after I put a radio in that had a short in it. I checked all the fuses and replaced the relay and still nothing works. I even replaced the relays for the headlights and tail lights and it didnt help. They worked fine until that radio shorted out. If i hold down the fog light switch the lights will come on and they turn off as soon as i let go. I even replaced the switch with no luck. Anyone with any suggestions?

 

your switch is bad, you probaly put another bad one in it, this is very common.
http://vfaq.com/mods/1g_foglight_switch.html