Heated Wiper Park Overview
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
When the rear window defrost button is pressed, the HVAC module activates the heated wiper park relay (located in the BJB). When the heated wiper park relay is active, the heated wiper park grids are energized.