RobRowe: Thank you very much for your comprehensive answer. You are correct, I referred to the prongs on the headlight. I will try what you say tomorrow.

One other question: could it be the headlight switch? I ask because when I got the jeep, the tail lights did not work. I traced the problem to a burnt wire going to them (the brake lights did work). It was burnt just past the switch. I replaced the wire and they work fine now. Maybe I should have put this in the first post, but I figured the headlight switch only sends power to the dimmer switch and therefore, would not be the problem.
thanx again
dave