I'll tell you what i found in my 91, my wifes 93, and my buddy's girl's 90 is that the seatbelt control module has failed and it is constantly trying to push it forward. As soon as you pull that plastic part off the side, which is easy, no screws or anything, if it has been on a while, you might notice it is warm. Even when it works, it should never beable to run so long it is warm. If it has not been like that for that long, you can reverse the wires to get it to come back, but because the relay that controls it is shot, you need to replace that module, or try to fix it if you want, i guess.