Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Under normal operation, the rear window wiper motor receives open and ground inputs from the steering column multifunction switch through circuits 410 (WH/OG) and 411 (BK/LB) to activate the wiper to the appropriate speeds.