When I put a bulb in courtesy light, it doesn't work. Test says there is power without bulb, when i put bulb in, it makes the whole fixture hot, take it out, power just at contact where it is suppose to be. It is the well courtesy light. When I test the other courtesy lights, with bulb in and working properly, the test light confirms powere only where it is suppose to be, not the whole back plate. I checked wire for exposure, everything good. I will say that before I changed switch, it worked fine. I put back in a Cole Heersey switch like factory, changed wires around. Does it matter how wires plug into switch? I tried both ways, same outcome.