It has been a while since they worked. I figured after sitting in the weather for a year it was just the bulbs themselves. I replace one and still nothing. Test the circuit, no power. "OK" I think to myself. I have power out of the switch and into the dimmer switch, but no power was coming out.So I buy a new switch and still nothing. So I try to jump it with a paper clip, but still nothing. The paper clip tested hot. WTF ?! Wiring diagram shows power into center wire of dimmer switch and out to headlights. Hence the paper clip. Two bad pieces ? Would think it's unlikely.