The dimmer switch is new and I know that is often the source of headlight problems due to the way the circuit is wired. The same problem is exhibited with the original dimmer switch.
What's the likely source of this problem?
I intend to run some temporary jumper cable grounds all over the place to see if there is a grounding problem. Each headlights grounds are clean and on unpainted metal of the inner fenders.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)