[4x4k30]

the door jam switch works when the jam switch pops out it grounds its self which is spring loaded to the back of the switch which is hot its just one wire that goes to it to the fuse box then to the headlight switch... with the door closed try to turn the headlight knob all the way to the left it should click that powers both the under dash light and the lamp in the cab if want to just buy 2 new door jamb switches and wire them both to a single hot wire and you should get the light to come on .the light should have a wire coming into it from each side .