Air Bag Module Check
WARNING: This page is about a different car, the 1993 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Remove air bag module. Visually inspect air bag module wiring harness for pinched or damaged wires. If wires are okay, go to AIR BAG MAIN WIRING HARNESS TEST. If wires are pinched or damaged, replace air bag module.