On my recently purchased 2003 Mustang GT convertible, the fog lamp switch doesn't seem to be working right. Or perhaps it's something else in the system, but I am not familiar with how it is meant to work electrically speaking. Is the switch a latching type? If so it doesn't latch. Or is it a momentary switch that controls something else? The LED in the switch does not come on either, like the traction control and rear defrost switches do. So far I have not attempted to diagnose it. The fog...

Fog lamp switch?