WINDSHIELD WIPER SYSTEM OPERATION

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Continuous Operation

1. When the windshield wiper switch moves to the 1 (low) position, current (1) flows to the windshield wiper relay in the relay block, turning on the windshield wiper relay.

2. When the windshield wiper relay is on, current flows to the windshield wiper motor for wiper operation at low speed.

3. When the windshield wiper switch moves to the 2 (high) position, current (2) flows to the windshield wiper relay and windshield wiper HI relay in the relay block, turning on the windshield wiper relay and windshield wiper HI relay.

4. When the windshield wiper relay and windshield wiper HI relay are on, current flows to the windshield wiper motor for wiper operation at high speed.

5. When the windshield wiper switch returns to the OFF position, the autostop function activates and the wipers stop at the park position.

Autostop Function

• While the wipers are operating, the autostop switch remains on except when the wipers are in the park position. Current flows through the autostop switch to the windshield wiper relay, the windshield wiper HI relay, the windshield wiper motor, then to ground. Thus, the wipers continue to operate until they reach the park position even if the windshield wiper switch moves to the OFF position.

One-touch Wiper Operation

• When the wiper lever is pushed up, the one-touch switch turns on, current flows to the windshield wiper relay in the relay block, the windshield wiper relay turns on, and current flows to the windshield wiper motor for operation at low speed.
While the wiper lever is pushed up and held, the wipers operate continuously at low speed. When the wiper lever is released, the autostop function activates and the wipers stop at the park position.

Intermittent Wiper Operation

1. When the windshield wiper switch moves to the INT position, current (1) flows from the control circuit in the windshield wiper switch to the windshield wiper motor for wiper operation at low speed.

2. When the preset period of time has elapsed, current from the control circuit stops flowing. Consequently, current to the windshield wiper motor stops, and the wipers stop in the park position by the autostop operation. The wipers operate at specified intervals cycling through this sequence of operations.

3. Optional wiper speed interval settings are provided according to INT volume.

Synchronized Washer And Wiper Operation

1. When the windshield washer switch turns on, current (1) flows to the washer relay (windshield) in the relay block, turning on the washer relay (windshield).

2. When the washer relay (windshield) is on, the washer motor operates and sprays washer fluid from the windshield washer nozzles. Simultaneously, the transistor turns on by the washer motor operation signal sent to the control circuit. Consequently, current (2) flows to the windshield wiper relay in the relay block, turning on the windshield wiper relay.

3. When the windshield wiper relay is on, the windshield wiper motor operates at low speed.