I just came through a similar struggle. Aftermarket light sockets came with bulbs. Nothing worked. Swapped to a different bulb and all problems resolved. My grounds were reaffirmed as first course. But as I went through the process I was looking for a list of the correct bulb numbers for the parking lights and for the tail Lights (1966). Does anyone have that list handy? Maybe helpful in this case.

Last edited by Hambone; 12/18/2019 12:58 PM.

~ HB
1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery
1962 Chevrolet C10
1962 Suburban