Electrical gremlins, old relays? moving seat belts sometimes get stuck, or don't move. Now running (position) lights don't go off when all off and key removed? I can only find a few relays, need relay locations and complete car schematic. I have Chilton's Total Care manual but it only shows major engine schematics.
It's a great car, everything simple and easy to work on, I've kept it running for my Mother in Law for the last ten years with minimal expences. She's retired on Soc. Security and it's cost less than a couple hundred dollars a year for all this time.