1929 Ford Model A Pickup

[1931fordmodela]

I am having an issue with my headlights,When I put on my parking light the low beams also come on. Mean time The high beams work and so do the low beams. I checked the timing for the headlight switch and that is fine. I have a new wiring harness. They have worked fine before today and all of a sudden the low beams also come on when I turn the parking light on. Any suggestions?>

 

[Tom Wesenberg]

It's usually the poor fitting (loose fit) contacts either at the base of the headlamp, or at the bulb socket. I've seen the same problem a few times and the problem was at the base of the headlamp, where the harness connects to the headlamp.