Windshield Washer System

SYSTEM OPERATION
With the Ignition Switch in "RUN", voltage is present at the Front Wiper Motor Assembly, the Wiper/Washer Amplifier Assembly and the Front Washer Motor Switch through Fuse 6 (Front Wiper).

WIPER OPERATION
Lo/Hi
With the Interval Wiper/Washer Switch in "LO", pins A and D of the Wiper/Washer receive a resistance signal. The Amplifier Assembly then applies ground to pin C to operate the Front Wiper Motor Assembly at "LO" speed. With the Interval Wiper/Washer Switch in "HI", pins A and D of the Amplifier receive a resistance signal and the Amplifier applies ground at pin E to operate the Front Wiper Motor Assembly at hi speed.

When the Interval Wiper/Washer Switch is moved to "OFF", the Amplifier removes ground from the Front Wiper Motor Assembly. The Motor continues to run since ground is available through its own "RUN" contacts. When the wiper arms reach the end of their strokes, the "RUN" contacts open and the Motor stops.

Interval
With the Interval Wiper/Washer Switch in "INTERVAL", Pins A and D of the Amplifier receive a resistance signal. The Amplifier then measures the resistance between Pins A & D to determine interval rate. The amplifier then applies voltage at pin C to operate the Motor at Lo speed for proper interval rate.

WASHER OPERATION
Pushing the end of the combination switch in causes the Washer Switch contacts to close. Pin A of the Amplifier receives a zero ohm signal in reference to pin C. The Amplifier then grounds pin F, causing the Front Washer Motor to run.