Wiper and Washer Systems: Description and Operation
INTRODUCTIONWARNING: VEHICLES ARE EQUIPPED WITH AN AIRBAG, REFER TO AIRBAGS AND SEATBELTS/AIRBAGS FOR STEERING WHEEL OR COLUMN SERVICE PROCEDURES.
The windshield wipers will only operate with the ignition switch in the ACCESSORY or IGNITION RUN position. The wiper circuit is protect against over loads by a fuse in the fuse block and a circuit breaker within the wiper motor. This protects the circuitry of the wiper system and the vehicle.
The wiper motor has permanent magnet fields.
The intermittent wiper system, in addition to low and high speed, has a delay mode and a pulse wipe mode. The delay mode has a range of 1 to 15 Seconds. Pulse wipe is accomplished by momentarily moving the stalk lever into the WASH position while the wiper switch is in either OFF or DELAY position. The wiper blades then sweep once or twice and return to the previous wiper switch mode, OFF or DELAY.
The intermittent wiper function is integral to the wiper switch. All electronics and relay are inside the switch assembly
The wiper system completes the wipe cycle when the switch is turned OFF. The blades park in the lowest portion of the wipe pattern.
SYSTEM OPERATION
Wiper Blades
Wiper blades, exposed to the weather for a long period of time, tend to lose their wiping effectiveness. Periodic cleaning of the wiper blade is suggested to remove the accumulation of salt and road film. The wiper blades, arms, and windshield should be cleaned with a sponge or cloth and a mild detergent or nonabrasive cleaner. If the blades continue to streak or smear, they should be replaced. The right and left wipers are different blade lengths. The driver side length is 525 mm and the passenger side length is 450 mm. The blades should not be interchanged.