Just asking here but is there a connector on your firewall that connects the under dash harness to the engine compartment harness (with the headlight wires)? Sometimes if this plug gets loose it pulls out just enough to disconnect one of the wires for the headlights. I went through two dimmer switches adn two new headlight switches before I found the loose connector on the firewall (cab side not engine side) Just something to check.
Last edited by Dragsix; 05/20/2022 3:37 PM.
