System Operation

The system operates only when the ignition switch is in the RUN" or "ACCY" position. When the wiper/washer 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 position is selected, 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.