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Home >> Ford >> 2002 >> Taurus SES, 3.0 S >> Repair and Diagnosis >> External Pages >> Different car >> Section 446 (Wiper System & Washer System - Excursion & F250-F550 Super Duty) >> Diagnosis And Testing >> Wipers and Washers >> Principles of Operation >> Intermittent Rear Window Wiper System (Excursion only)

Intermittent Rear Window Wiper System (Excursion only)

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. 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 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, its 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 disconnects 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.