Rear Wiper Motor
WARNING: This page is about a different car, the 2017 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The rear window wiper motor assembly contains an integrated relay and a single speed motor. When the windshield wiper motor momentarily energizes the integrated relay within the rear wiper motor, the rear window wiper activates. The integrated relay is used to continue the rear window wipe and park the wiper motor.