It may be some sort of coating burning off. I assume all lights are working? I believe the switch has a thermal overload breaker. If it does or it's fused, You are good to go. The "spring" is a coil to act as a rheostat/resistance to vary the voltage to dash bulbs, as a dimmer.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn