Found my dads original 1971 duster!

Of course its not the dimmer switch. That's makes little sense. That wouldn't effect parking lights or turn signals.

dads71 said

This post made a lot of sense to me. I can’t find who posted it. Maybe I found it during a Google search

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Glad that person's description clicked with you. Different peaople have different ways of learning, or respond better to different explanations.

https://www.forabodiesonly.com/mopa...s-original-1971-duster.560811/post-1974741812Sorry above was the best I could do.