Theory Of Operation
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
The Body Control Module (BCM) monitors the operation of the Front Wiper Motor through the Front Wiper Park Switch, which is integral to the Front Wiper Motor. The Front Wiper Park Switch switches the signal circuit to ground when the Front Wiper Motor is in the park position.