The windshield wiper/washer system consists of a wiper motor, a transmission, wiper arm and blade assemblies, a washer pump and a washer solvent level sensor mounted on a washer fluid reservoir, and a wiper/washer switch. Vehicles equipped with the Rainsense option have a Rainsense module mounted ahead and to the right of the inside rear view mirror.

The pulse type windshield wiper/washer system includes an operating mode in which the wipers make single sweeps with an adjustable time interval between sweeps. The time interval is controlled by a solid state timer in the wiper motor cover. The duration of the delay interval is determined by the delay resistor in the wiper/washer switch.

Vehicles equipped with the Rainsense option include an operating mode in which the wipers operate only when the rainsense module detects moisture on the windshield. The wiper speed is controlled by the rainsense module based on the amount of moisture detected on the windshield.

Demand wash function is controlled by a printed circuit board in the wiper motor cover. The wiper motor also is equipped with radio frequency interference RFI suppression.

With the wiper switch in DELAY (pulse), battery voltage is applied to the wiper motor cover through the accessory voltage circuit. Controlled voltage is applied to the wiper motor cover through the windshield wiper switch signal 1 circuit and the windshield wiper switch signal 2 circuit.

The length of delay time between sweeps is controlled by the variable-pulse delay resistor in the wiper washer switch. The delay is adjustable from 1-22 seconds, nominally.

With the wiper switch in AUTO DELAY (Rainsense), battery voltage is applied to the wiper motor cover through the accessory voltage circuit. Controlled voltage is applied to the wiper motor cover through the windshield wiper switch signal 1 circuit and the windshield wiper switch signal 2 circuit. When the ignition switch is in RUN or ACCY, battery voltage is applied to the Rainsense module through the accessory voltage circuit. The rainsense module activates the wiper motor through the rain sense signal 1 circuit and the rain sense signal 2 circuit if moisture is detected on the windshield.

In the LO position of the wiper switch, battery voltage is applied to the wiper motor cover through the accessory voltage circuit and the windshield wiper switch signal 1 circuit. Controlled voltage is applied to the wiper motor cover through the windshield wiper switch signal 2 circuit.

In the HI position of the wiper switch, battery voltage is applied to the wiper motor cover through the accessory voltage circuit, the windshield wiper switch signal 1 circuit, and the windshield wiper motor high speed circuit. Contolled voltage is applied to the wiper motor cover through the windshield wiper switch signal 2 circuit.

When the washer switch is turned ON, battery voltage is applied to the wiper motor cover through the windshield wiper switch signal 2 circuit. The wiper motor has voltage applied to it automatically by the wiper motor cover and operates at low speed during the wash cycle and then for two sweeps after the wash cycle is complete. If the wipers had been in DELAY, LO or HI, they would return to that operation after the wash cycle.

When the wiper switch is turned to MIST and released, the wipers make one sweep at low speed and return to park position. If the wiper switch is held in MIST, the wipers will continue to operate until the switch is released. In the MIST position, battery voltage is applied to the wiper motor cover through the accessory voltage circuit and the windshield wiper switch signal 1 circuit. Controlled voltage is applied to the wiper motor cover through the windshield wiper switch signal 2 circuit.

WINDSHIELD WASHER FLUID LOW - 25

The IPC illuminates the WINDSHIELD WASHER FLUID LOW - 25 indicator in the DIC when the BCM detects a low washer fluid condition (signal circuit is low) for greater than 30 seconds. The DIC receives a class 2 message from the BCM requesting illumination.