cabtruck

Got a 93 d250 went to leave this morning no head lights.as long as I held the dimmer switch lights stay on.then pulled switch it and out got them to work any idea what would cause this I saw something about rewiring them but does this sound like the problem

j_martin

Could be the headlight switch, the multifunction switch, or one of the connectors to either.

The headlight relay mod would prevent a re-run of this damage in the future, and also add a bit of brightness to the lights.

peckens

The wiring harness plug going to the switch also tends to melt a bit too.

cabtruck

Thanks for the info bad thing is now there working and I can't find the problem

cougar

This kind of problem points to the headlight switch. The multifunction switch bypasses the headlight switch so they can be used as passing lights.