My buddy has a '94 GP, 3.1, automatic. He has a problem with the starter circuit. Quite frequently, turning the ignition switch results only in a clank in the starter, but the starter will not spin the engine.
His son is an ASE certified mechanic, and they have spent hours on this problem with no success. Parts replaced so far: starter (3 times); battery; battery cables; ignition switch; neutral safety switch; ignition switch wiring harness. The wiring has been checked; the firewall wiring harness socket and plug cleaned; all connections cleaned and tightened.
He can get usually the starter to turn by repeatedly bumping the switch. When this fails, he can start the car by jumping the connections on the starter relay.
His son now thinks it may have something to do with the anti-theft device, but we all think the anti-theft device would keep the engine from starting, not keep the starter from spinning.
Any insight or ideas on this problem would be much appreciated.