Classic/Antique Car Repair: 1962 impala Running lights not working, ground connections, running lights

Question
My 1962 impala Running lights not working. I have checked bulbs+fuses, changed headlight & brakelight switch. Would it be the wireharness? I was told to check the ground connections but where are they found? Any info would be helpful. thanks

Answer
Jim, it's pretty unlikely that all of the grounds for all the lights would be failing at the same time. On the other hand, this does sound like a grounding issue, so I'd check the ground circuit, beginning with the battery-to-body cable, and make sure it's unbroken to the lighting switch, body, frame, and engine.

--Paul