theres a plug under the little kick panel on the drivers side of the car that has the wires for the auto belt in it. disconnect the plug and look for corrosion or a broken wire at that plug. this is a common problem on these cars. theres more then one plug behind the kick panel, so check them all, I don't remember what it looks like to discribe it to you other then that its a white plug with prob 16 or so pins. if all looks good there, the problem may be in the door latch itself, since that's where the switch is that controls the belts. My money is on a corroded or broken wire under the kick panel though.