On my 57 I believe the dome lite has constant voltage and the switch makes and breaks the ground connection. If I remember right the terminal is at the front of the switch - knob end. Someone please correct me if I'm wrong, its been awhile since I worked on it.


"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150