WINDSHIELD WIPERS AND WASHERS
TABLE OF CONTENTS
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DESCRIPTION AND OPERATION
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . . 1
WINDSHIELD WASHERS . . . . . . . . . . . . . . . . . . . 2
WIPER BLADES . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
MULTI-FUNCTION SWITCH – WINDSHIELD
WIPER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WINDSHIELD WASHERS . . . . . . . . . . . . . . . . . . . 3
WINDSHIELD WIPER SYSTEM CONDITIONS . . . 3
WIPER MOTOR SYSTEM . . . . . . . . . . . . . . . . . . . 6
REMOVAL AND INSTALLATION
MULTI-FUNCTION SWITCH . . . . . . . . . . . . . . . . . 8
STEERING COLUMN SHROUDS. . . . . . . . . . . . . . 8
WASHER NOZZLE. . . . . . . . . . . . . . . . . . . . . . . . . 8
WASHER RESERVOIR . . . . . . . . . . . . . . . . . . . . . 8
WASHER RESERVOIR PUMP . . . . . . . . . . . . . . . . 9
WIPER ARM AND BLADE. . . . . . . . . . . . . . . . . . . 9
WIPER BLADE . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
WIPER BLADE ELEMENT . . . . . . . . . . . . . . . . . . . 9
WIPER ARM LINKAGE OR CAP . . . . . . . . . . . . . 10
WIPER MOTOR. . . . . . . . . . . . . . . . . . . . . . . . . . 10
WIPER MOTOR ASSEMBLY . . . . . . . . . . . . . . . . 10
WIPER MOTOR ASSEMBLY MOUNTING
GROMMET . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CLEANING AND INSPECTION
WIPER BLADES . . . . . . . . . . . . . . . . . . . . . . . . . 11
ADJUSTMENTS
WIPER ARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DESCRIPTION AND OPERATION
MULTI-FUNCTION SWITCH
WARNING: VEHICLES ARE EQUIPPED WITH AN
AIRBAG,
REFER
TO
GROUP
8M,
PASSIVE
RESTRAINT SYSTEMS FOR STEERING WHEEL OR
COLUMN SERVICE PROCEDURES.
DESCRIPTION
The multi-function switch contains:
• Turn signals
• Hazard warning
• Headlamps
• Headlamp beam select
• Parking lamps
• Panel dimmer
• Fog Lamp
• Headlamp optical horn
• Windshield wiper
• Pulse wipe
• Mist wipe
• Windshield washer switches.
The multi-function switch is mounted center of the
steering column. There are two levers, one on each
side of the steering column.
OPERATION
The left side controls the signaling and lighting.
The right side controls the windshield wiper and
washer system. To use the washers pull lever toward
the driver. The mist is a single wipe operation by
pushing lever down and releasing the lever. Intermit-
tent wiper operation is controlled by the Body Con-
trol Module (BCM). The lever has a selection of delay
intervals and by turning the lever the wiper will
cycle every half second to 36 seconds depending ON
the vehicle’s speed. The wiper has two cycle two
speeds.
The windshield wipers will only operate when the
ignition switch is in the ACCESSORY or IGNITION
RUN position. Fuse 15, located in the Junction Block,
fuses 8 and 14 in the Power Distribution Center
(PDC) block, protects the wiper/washer system cir-
cuitry. The wiper motor also has an internal non-ser-
viceable circuit breaker to provide protection against
motor stall conditions.
The wiper and washer motors have magnetic fields
created by internal permanent magnet. Electric
power applied to the motor armature, located in the
magnetic field, causes the motor to turn.
The wiper system internal operation uses the low
speed motor circuit in combination with intermittent
wipe relay. The washer pump motor has one internal
circuit and therefore operates at one speed.
The wiper and washer system switch located on
the steering column selects the mode of operation of
the motors. The switch provides input to the BCM,
which in turn operates the two relays. The intermit-
tent wipe relay turns the wiper ON and OFF. The
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WINDSHIELD WIPERS AND WASHERS
8K - 1