Park Position Operation
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The wiper and rear wiper fuses, supply voltage to signal circuit of the front and rear wiper motor, respectively. The signal will be pulled to voltage by the wiper motor while the windshield wiper motor is operating. When the windshield wiper motor has parked, the signal is at ground, (front wiper motor), or open, (rear wiper motor).