Headlight Wiring Help

[Motorhead-47]

I bought a 67 C10 last weekend and I need some headlight wiring help from the experts. Background....the previous owner put a new Painless Performance harness in the truck. On high beams I get bright lights and a good high beam indicator on the dash. On low beam, the lights are very yellow/dim and the high beam indicator on the dash glows dim. Both the headlight switch and dimmer switch are new.

OK, here is what I see with a multimeter. With the lights off, all three terminals at the harness at the headlight plug show continuity to ground. With high beams on, I see 13v on the high beam terminal at the headlight, ground at the low beam, and 13v on the ground wire. On low beam, I see 13v on the high beam, ground on the low beam, and 7 volts on the ground wire.

This drawing is from looking at the back of the headlight. Hopefully I have that right.






Anyone have an idea what is wired wrong where?