Thanks guys.
I was going to try to find an LED 12v bulb to put in it. You know what happens to those kind of switches over time.....the heat from the bulb melts the plastic knob.
The fan motor only has two wires: power and ground. The switch is three position: off, low, and hi. I don't know if the switch will control the speed of the fan motor or not. Probably doesn't matter anyway, as long as it supplies current to the motor. If I need heat, I can't imagine I will want to be turning it on "low" because it gets so hot in there

I'll hook it up and see what happens.
Thanks again.