Chased down all of the wires inside and outside the cab... Everything inside the cab has continuity, everything outside also has continuity.. If I unplug the bulkhead connector and apply 12v with a power probe, the lights all work as they should.. including the blinkers. it also tests 12v inside...
I have an 84 C10 with a weird lighting issue. All of the exterior lights work.. Headlights High and low beam, Tail Lights, Marker Lights, Parking lights all work. Both rear blinkers work with both the hazard flashers and the turn signal switch. Front blinkers do not work at all. Have tried...