I tore out my dash today, all the wiring is there, the buzzers are there, and my glovebox light and courtesy lights all work. They look to share much of the same wiring so....
I inspected the seatbelt latch and i don't see any wires either. Where exactly is the sense located in/on the seatbelt?
Also connected up (or so it looks like) is a light bulb for the ash tray, that doesn't work (filaments are still there). Having so many things out of order suggests in my mind the a common wire or something in the circuit has been disconnected(?). All my fuses appear to be present, too.
Christopher in Portland Or. 1981 F250 Ranger XLT 4x4 trailer special 351M, and auto C6