Headlight problems

[drolston]

Originally Posted by 19Fordy

Be sure to check all the slip in wire connectors that join the wires together

Especially the ones on the frame rail just behind the radiator, on the left/driver side. That bunch is more exposed to getting jostled loose, and to corrosion.

If the dimmer switch is not connected, it may be that someone wired it so that both the high and low headlight beams come on at the same time. That would double the normal current load through the switch, wiring and circuit breaker, probably causing the circuit breaker to cycle and wires to get hot.