Originally Posted by latech
could be a problem with the neutral switch or clutch switch ,(stick or automatic), also there is probably a starter relay in the circuit, in the underhood fusebox, which could be the trouble.
automatic...neutral switch is a blocking plate near the key to keep the rod from pushing the switch...can't be that I think. no relay...purple wire gets it's juice from the switch to the S terminal on the solenoid. could be a weak or old purple wire... when I hooked up a volt meter to the S terminal and my son kept turning the key when we were stuck I got a wide variety of lowvoltage readings indicating a bad circuit. Must it be the ground through the solenoid or still maybe a bad switch? The screwdriver over-rides this problem by giving it a good battery terminal jolt to the S terminal I think. But on occasion I see a weak spark and it won't crank with the screwdriver either.