General Description

The rear window wiper/washer system has a one-speed. permanent magnet, non depressed-park wiper motor assembly with a pulse (delay) mode. The wiper motor assembly drives a gear box, that in turn drives a wiper pivot that provides an oscillating output to the arm and blade.

A controller assembly is retained by the wiper motor bracket and is the only replaceable wiper motor component. The controller's printed circuit board controls all wiper motor functions as determined by the position of the wiper/washer switch.

SYSTEM OPERATION
The system operates only when the ignition switch is in the "RUN" or "ACCY" position. There are four electrical terminals on the controller assembly of the wiper motor assembly.

When the wiper switch is turned on, battery voltage is applied to terminal B of the controller. The motor and controller are grounded at terminal A. If the delay button is pressed, battery voltage is applied to terminals B and D at the controller. The operation of the wiper motor will be pulsed, with about 9 seconds between each wiper sweep.

When the wiper switch is turned off, only terminals A and D are used. Terminal D remains battery positive and the circuit is completed through terminal A and the closed park switch terminals. A cam on the wiper motor gear then opens at the park position and the wiper motor turns off.