The Wiper / Washer System consists of the following components:

The windshield wiper motor module is part of the windshield wiper motor cover and controls the wiper motor operation. The windshield wiper motor is a 2 speed motor. Windshield wiper intermittent operation is a low speed wiper motor function with a variable delay interval between the wipe cycles. The intermittent interval is controlled through a series of resistors within the wiper / washer switch.

Voltage is supplied by the:

Ground is applied from:

When the wiper / washer switch is in the LOW position, two different voltages are applied to the windshield wiper module to operate the windshield wiper motor at low speed.

With the wiper / washer switch in the HIGH position, three different voltages are applied to the windshield wiper module to operate the windshield wiper motor at high speed.

Windshield wiper intermittent operation is a low speed wiper motor function with a variable delay interval between the wiper motor cycles. The delay interval is determined by a series of resistors within the wiper/washer switch. During intermittent wiper operation, the windshield wiper switch signal 1 circuit is reduced through the resistors.

When the wiper / washer switch is in the intermittent position, two different voltages are applied to the windshield wiper module to operate the windshield wiper motor in an intermittent mode at low speed.

When the windshield wiper / washer switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the wiper motor module will continue to operate the wiper motor until the wipers reach the park position. If the ignition is turned off while the wipers are in mid-cycle, the wipers will stop immediately where they are. The wipers will park the next time the ignition is cycled to the ON position.

When the wiper switch is moved to the MIST position, the wiper motor will operate in the low speed mode until the switch is released. Two different voltages are applied to the windshield wiper module to operate the windshield wiper motor until the cycle is completed.

When the wiper switch is moved to the WASH position, the washer fluid pump and wiper motor will operate until the switch is released. When the wiper switch is moved to the WASH position:

The wiper motor will continue to operate for approximately 2 wipe cycles after the wash switch is released. Ground for the windshield washer fluid pump is supplied from G103.

The low washer fluid indicator is located in the instrument panel cluster (IPC). Ground is applied at all times from G103 to the windshield washer fluid level switch. When the washer fluid is low, ground is applied to the washer fluid level switch circuit to the IPC. The IPC will then illuminate the "check washer fluid message."

The outside moisture sensor monitors moisture accumulation on the windshield and commands the windshield wiper module / motor. The windshield wiper / washer switch intermittent positions are used to activate the automatic operating mode and to adjust the level of sensitivity to moisture accumulation. The windshield wiper module / motor sends the status of the windshield wiper / washer switch to the moisture sensor using a pulse width modulation (PWM) voltage signal through the moisture sensor signal 1 circuit. Moisture sensor signal 2 confirms that the moisture sensor is receiving the moisture sensor signal 1. If communication is lost, the wiper module / motor will use the inputs from the windshield wiper / washer switch in the intermittent positions to operate the wiper module / motor at delay intervals.