Rear Window Washer
WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
When the wiper/washer switch is placed in the rear WASH position, the SCCM sends the request to the windshield wiper motor through the LIN. The windshield wiper motor energizes the rear washer relay (located in the BJB), directing washer fluid to the rear window.