No Parking Lights

We first suspected the headlight switch was the issue. However, we replaced it with a new one and it did not correct the proble.

Yes, we do have the complete manual and I have a master parts book for '72, so we have been scouring those. We started tracing the wires yesterday, then ran out of time.

Likelihood of a bad or no ground issue?

Thanks for your suggestions and please keep them coming.:violent1: