WINDSHIELD WIPER SYSTEM OPERATION


BHE091901052T05

Low Speed And High Speed Operation

• When the windshield wiper switch moves to the 1 (low) position, current (1) flows through the windshield wiper switch to the windshield wiper motor, then to ground. The wipers operate at low speed.

• When the windshield wiper switch moves to the 2 (high) position, current (2) flows through the windshield wiper switch to the windshield wiper motor, then to ground. The wipers operate at high speed.

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

1
One-touch switch
2
INT volume
3
INT relay
4
Windshield washer switch
5
Autostop switch
6
Windshield wiper motor
7
Windshield washer motor

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 INT relay to the windshield wiper switch, 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.

1
INT volume
2
INT relay
3
Windshield washer switch
4
Autostop switch
5
Windshield wiper motor
6
Windshield washer motor

One-touch Wiper Operation

• When the wiper lever is pushed up, the one-touch switch turns on, and current flows through the one-touch switch to the windshield wiper motor, then to ground. The wipers operate at low speed for one cycle.

• 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.

1
One-touch switch
2
INT volume
3
INT relay
4
Windshield washer switch
5
Autostop switch
6
Windshield wiper motor
7
Windshield washer motor

Intermittent Wiper Operation

• When the windshield wiper switch moves to the INT position, the intermittent wiper (INT) relay turns on, and current flows through the INT relay to the windshield wiper switch, windshield wiper motor, then to ground. The wipers operate at low speed.

• When the preset period of time has passed, the INT relay turns off. The current stops flowing through the windshield wiper motor. The autostop function activates, and the wipers stop at the park position. Cycling through this sequence of operations, the wipers operate at specified intervals.

• The INT volume provides optional settings of the wiper sweep interval (timing that the INT relay turns from off to on).

1
INT volume
2
INT relay
3
Windshield washer switch
4
Autostop switch
5
Windshield wiper motor
6
Windshield washer motor

Synchronized Washer And Wiper Operation

• When the wiper lever is pulled toward the driver, the washer switch turns on and current (1) flows through the washer switch to the windshield washer motor, then to ground. The windshield washer motor activates and washer fluid is sprayed.

• At the same time, the INT relay turns on, and current (2) flows through the INT relay to the windshield wiper switch, the windshield wiper motor, then to ground. The wipers operate at low speed.

1
INT volume
2
INT relay
3
Windshield washer switch
4
Autostop switch
5
Windshield wiper motor
6
Windshield washer motor