High-Speed Windshield Wipers
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
High speed is activated when the windshield wiper/washer switch supplies a specific ground input to the windshield wiper motor module. The windshield wiper motor module then grounds the run/park relay and the HI/LO speed relay. Voltage is then sent to the high speed side of the wiper motor, which activates the high-speed mode. High-speed mode is exited by selecting a different state on the switch. When the switch is placed in the PARK position, and the Hall-effect sensor senses the motor magnet. The output to the run/park relay deactivates the relay and disconnects the voltage to the motor.