I'm not sure what happened, but when I turn off the windshield wiper switch, the wipers stop in their tracks, they don't go back to their neutral position at the base of the windshield. Is my wiper switch bad or wiring problem?

Sounds like a motor problem where the motor is not completing its last cycle before shutting off. This may help you check things out. http://www.chevelles.com/forum/Forum22/HTML/001734.html