I forgot to mention that they did work at one time. I haven't tried turning on the headlights in awhile, because there has never been a need to, and I haven't driven it at night. I remember in the past, the headlights didn't come on and I had to jiggle the switch a little before they would come on. I do have a simplified wiring diagram in one of my manuals, and it shows two different color power wires, one going to the rear taillamps, and the other to the front park lamps. I tried checking for voltage at the headlight switch, and couldn't detect any voltage on the wire supposedly going to the park lights. I did measure voltage on the other 3 wires ??