Intermittent Rear Window Wiper System

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.

The rear window wiper intermittent speed is activated when the rear window wiper motor module receives ground controlled by the steering column multifunction switch inputs to the rear window wiper motor module. The rear window wiper motor module then activates the rear window wiper relay (internal) by momentarily grounding the relay coil. This activates the rear window wiper motor by providing voltage from the battery junction box (BJB). Once the rear window wiper motor is activated, it's internal run/park switch connects voltage to the motor, keeping it operating. When the rear window wiper motor returns to the PARK position, the run/park switch disconnect voltage internally from the wiper motor input, reconnecting it to the rear window wiper motor module output. The rear window wiper remains parked until the rear window wiper motor module completes a time-out and then repeats the cycle.