I have a 2002 Tahoe that has non working factory fog lights. I replaced the fuse 15Amp, both bulbs
(one was burnt out) and I replaced the fog light relay, and Nothing!! I jumped the relay and
got the fog lights to come on. The indash foglight button (when pushed) does nothing but lights up
whenI jump the relay. I also noticed that the light on reminder bell ( the tone then you leave the lights on and pull the keys) does not sounds at all. Only the keys left in the ignition reminder sounds (not sure if that has to do anything with the fog lights not working) does anyone have a way to test the head light control or the fog light switch? what am I missing

 

Try jumping the switch. If you get fog lights when you jump the switch, the switch is bad and needs to be replaced.

 

I jumped the swith and nothing I did get the rear wiper to go
I did notice that the test light on the switch was much brighter when i
tested the feed for ignition key then the feed from the parking light head light
feed when the switch was turned on I tryed a head light switch I know is good and the same thing

 

I just e-mailed you, but when you say you "jumped the relay" did you jump the coil side of the relay, or did you jump the switched side?