One Dim Headlight

[doogie67]

Hi everyone, I have a electrical problem. I think it's my headlight switch. My drivers side headlight is very dim. The passenger side is fine. Also when I turn on my headlights the domelight will not turn off and my turn signals are screwed up.

 

[mustangdave]

Most likely the switch: replace, but also clean all ground points.

 

[enferno]

i had the same problem on my '66.
turned out it was one of the grounds. look on your radiator support. opposite of the horns (meaning under the hood, on the engine side of the radiator support) there should be 2 ground right around the neighborhood of the horns (opposite) that are for the headlights. one of mine popped off and only one headlight was dim. regrounded it and bingo!