Rear Window Wiper
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
When the wiper/washer switch is in the INT 1 or INT 2 position, the SCCM sends the request to the windshield wiper motor through the LIN. When the request is received, the windshield wiper motor supplies ground to an integral relay within the rear window wiper motor which activates the motor. The position of the wiper/washer switch determines how many times per minute the windshield wiper motor provides the ground to activate the rear wiper motor.
The rear window wiper motor is self-parking.