I have a restored 1966 el camino. The problem is sometimes the interior lights and tail lights will cease to illuminate. Obviously this is noticed at night. When this occurs, the only lights that do operate are the head lights.
It seems to be random event. Sometimes the lights work normally. When I restored the car, I did not replace wiring harness as it looked in great condition throughout. I checked the ground to the rear harness assembly and it is connected and tight. I figure its a short or bad ground but no evidence of either. Any ideas? thanks in advance for any help.