GM Wiper Circuit
OK lets wait and see if you get the wiper control module. Your stalk switch wiring will not work with Pete's circuit because the grey wire is different, and because (maybe) the motor is wired different, too.
I wanted to know about the Newport motor wiring and operation so I could see how to design the circuit the right way. In Pete's circuit, connecting the Park to the High speed connection makes the motor park. I do not think the Newport motor is wired like that.