Another fog light question

Well, from what i hear the cherokees tend to have a little wiring issue....infact my fog lights do when i go to turn them on they dont come on,the switch doesn't light up and i checked the bulbs and fuse and they seem to be fine....i dont even know where to start looking any suggestions?
its a 1990 laredo 4x4 4.0L if that matters

Thx,
Rob

the fog lights have a relay as well, not sure where yours is.

Look behind the right headlamp, on the wheelwell.

1993 XJ, My fog relay is behind the driver side headlight near the air filter box. The problem was about 12" away in a multi-pin connector for all the lights, where the power lead for the relay had corroded.