OK! Thanks for the clarification about GRD. That was puzzling. Reaching behind the dash to the A Pillar I found a pair of wires molded together. Not sure if I can actually get to them. (May need someone with a younger back!) The dome light bulb/socket is an 1176. 2 filament. So it must have been changed. My first thought was a dome light/door light type of combination. But looking at the wires, it was changed to this dual wire setup somewhere in the past. With your help, this is now making a bit more sense. Replacing the dome light to the proper one, connecting the paired wires to both sides of the switch, and leaving the short gray jumper wire to be used at a later date, make this all much clearer. Now to find a younger back, with nimble fingers, to access the A Pillar wires. Thank you!!!!
