Anything is possible when a computer is involved, but in my limited experience, every time the Body Computer has been at fault, the wiper motor was dead in all speeds. That said, I'm working with another fellow with similar problems on a '97 model. His only works on the high speed.
There have been problems with the ground strap on the motor mounting plate making poor contact under the mounting bolt head, but that will cause the motor to not run. The park switch turns on in the park position to ground the sensing wire. That tells the computer to turn the motor off. If the problem acts up again where they don't turn off, use a piece of wire to ground the dark green / white wire in the motor's connector. As long as it's grounded, the motor should not run. If it does still run, that wire has a bad connection or the Body Computer is defective.
If the motor stops when the wire is grounded, suspect the park switch inside the motor. The fix would be replacing the motor.
Wednesday, June 16th, 2010 AT 4:28 AM