See my reply above to 67Dart273. He pointed me in the right direction with 12v being present at B1 and B2. Regarding the parking lights, I've noticed that when I pull the headlight switch to the first position (headlights off, parking lights on), all four lights are lit up. But when I pull it out to bring on the headlights, the front parking lights go off while the rear parking lights remain lit. I assume that this is normal, and that maybe the DOT mandated they stay on with the headlights sometime after 1964. Seems like I saw or heard that somewhere.