Wiper and Washer Systems: Description and Operation

Fig. 17 Rear wiper wiring circuit. Escort & Lynx:

Fig. 18 Rear wiper wiring circuit. Taurus & Sable:

Fig. 19 Rear wiper wiring circuit. Exc. Escort, Lynx, Taurus & Sable:

The rear wiper is operated by a one speed, permanent magnet type motor with an integral park switch. Motor operation is controlled by a dash mounted switch, and the circuit is protected by an in-line circuit breaker and the accessory fuse. A washer motor is also operated by the switch, using the same feed circuit from the accessory fuse. During normal operation, current is supplied directly to the motor run brush through the wiper switch, and the circuit is completed through a ground brush to the motor housing. When the wiper switch is in off position, current is supplied to the motor run brush through the park switch, which allows the motor to run until the wiper arm reaches its lowest point of travel. A cam on the motor shaft opens the park switch, stopping the motor, and allowing the wiper arm to park at the bottom of its travel. Current to the motor park switch is supplied directly from the feed circuit, Figs. 17 and 18, or through the wiper switch on all other models, Fig. 19. When the washer is operated on Escort and Lynx models, the wiper motor will run until the washer switch is released. On all other models, the wiper must be switched on separately when the washer is operated.