[DanEC]

My hunch that the Pass side parking light was getting power from the green wire appears to be wrong.

With ignition on, parking lights on, and signals off - I have 12 volts on both green and red contacts in the parking light socket on the Pass side. I can only pick up power on the green wire at connections 54/27 when the signal is switched on.

It kind of seems like the green wire at the Pass side turn signal is not the same green wire at the 54/27 and coming out of the steering column and at the split between rear and front circuits at connector 68. I guess tomorrow I will take my meter and see if I can get continuity on the green wire between 54 and the turn signal contact in the light housing.