
WINDSHIELD WIPER and WASHER SYSTEMS
TABLE OF CONTENTS
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WINDSHIELD WIPER SYSTEM................ 1WINDSHIELD WASHER SYSTEM.............. 8
WINDSHIELD WIPER SYSTEM
TABLE OF CONTENTS
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GENERAL INFORMATION
INTRODUCTION..........................1
DESCRIPTION AND OPERATION
WIPER BLADES...........................1
DIAGNOSIS AND TESTING
WINDSHIELD WIPER CONDITIONS............2
WINDSHIELD WIPER MOTOR................3
WINDSHIELD WIPER/WASHER SWITCH........5
REMOVAL AND INSTALLATION
WINDSHIELD WIPER ARM(S)................5WINDSHIELD WIPER BLADE(S)..............5
WINDSHIELD WIPER BLADE ELEMENT........5
WINDSHIELD WIPER LINKAGE...............5
WINDSHIELD WIPER MODULE...............6
WINDSHIELD WIPER MOTOR................6
WINDSHIELD WIPER/WASHER SWITCH........6
CLEANING AND INSPECTION
WINDSHIELD WIPER BLADE(S)..............6
ADJUSTMENTS
WINDSHIELD WIPER ARM(S)................6
GENERAL INFORMATION
INTRODUCTION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M, PASSIVE
RESTRAINT SYSTEMS FOR STEERING WHEEL
REMOVAL AND INSTALLATION.
The windshield wipers will only operate with the
ignition switch in the ACCESSORY or IGNITION
RUN position. The wiper circuit is protected against
over loads by a fuse in the fuse block and a circuit
breaker within the wiper motor. This protects the cir-
cuitry 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.
The wiper switch also includes the MIST feature
which provides a single wipe when actuated.
DESCRIPTION AND 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 550 mm and the passenger side
length is 475 mm. The blades should not be inter-
changed.
PLWINDSHIELD WIPER and WASHER SYSTEMS 8K - 1

WIPER MOTOR TEST
CONDITION POSSIBLE CAUSES CORRECTION
WIPER BLADES DO NOT
PARK PROPERLY.(1) WIPER ARMS IMPROPERLY
PARKED.
(2) WIPER ARMS ARE LOOSE ON
PIVOT SHAFT.
(3) MOTOR CRANK LOOSE AT
OUTPUT SHAFT.(1) REMOVE WIPER ARMS AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
(2) REMOVE WIPER ARM AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
(3) REMOVE WIPER ARM, RUN WIPER
MOTOR TO PARK POSITION AND
REMOVE THE MODULE. WITHOUT
ROTATING THE MOTOR OUTPUT
SHAFT, REMOVE THE CRANK AND
CLEAN ANY FOREIGN MATTER FROM
THE MOTOR SHAFT. INSTALL THE
MOTOR CRANK IN ITS ORIGINAL
POSITION.
MOTOR STOPS IN ANY
POSITION WHEN THE
SWITCH IS TURNED
OFF.(1) OPEN PARK CIRCUIT. (1) CHECK PARK SWITCH BY
DISCONNECTING THE WIRE
CONNECTOR AND APPLY BATTERY
VOLTAGE TO PIN 4. PLACE A JUMPER
WIRE FROM PIN 2 TO PIN 3 AND THEN
TO AN EXTERNAL GROUND. REPLACE
MOTOR IF IT DOES NOT PARK.
MOTOR WILL NOT STOP
WHEN THE SWITCH IS
TURNED OFF.(1) FAULTY SWITCH.
(2) LOCK OF DYNAMIC BRAKE
ON WET GLASS.(1) CHECK SWITCH IN LOW, HIGH AND
INTERMITTENT POSITION.
(2) ENSURE PARK SWITCH HAS
CLEAN GROUND.
WIPER BLADES SLAP
AGAINST COWL
SCREEN OR WINDOW
MOLDINGS.(1) WIPER ARMS ARE PARKED
INCORRECTLY.(1) PARK WIPER ARMS. REFER TO
WIPER ARM ADJUSTMENT.
BLADES CHATTER. (1) FOREIGN SUBSTANCE SUCH
AS POLISH ON GLASS OR
BLADES.
(2) ARMS TWISTED, BLADE AT
WRONG ANGLE ON GLASS.
(3) BLADE STRUCTURE BENT.
(4) BLADE ELEMENT HAS
PERMANENT SET.(1) CLEAN GLASS AND BLADE
ELEMENT WITH NON-ABRASIVE
CLEANER.
(2) REPLACE ARM.
(3) REPLACE BLADE.
(4) REPLACE BLADE ELEMENT.
WIPER KNOCK AT
REVERSAL.(1) LINKAGE BUSHINGS WORN.
(2) ARMATURE ENDPLAY IN
MOTOR.(1) REPLACE WORN LINK. REFER TO
WIPER LINKAGE REMOVAL AND
INSTALLATION.
(2) REPLACE WIPER MOTOR. REFER
TO WIPER MOTOR REMOVAL AND
INSTALLATION.
WIPER MOTOR WILL
NOT RUN.(1) BLOWN FUSE.
(2) NEW FUSE BLOWS.
(3) NEW FUSE BLOWS.
(4) NO VOLTAGE AT MOTOR.
(5) POOR GROUND.(1) REPLACE FUSE, AND RUN
SYSTEM.
(2) CHECK FOR SHORT IN WIRING OR
SWITCH.
(3) REPLACE FUSE, REMOVE MOTOR
CONNECTOR, TURN SWITCH ON,
FUSE DOES NOT BLOW, REPLACE
MOTOR.
(4) CHECK SWITCH AND WIRING
HARNESS. REFER TO GROUP 8W,
WIRING DIAGRAMS.
(5) REPAIR GROUND WIRE
CONNECTION AS NECESSARY.
8K - 4 WINDSHIELD WIPER and WASHER SYSTEMSPL
DIAGNOSIS AND TESTING (Continued)

WINDSHIELD WIPER/WASHER SWITCH
To test the switch, first disconnect the switch wires
from the body wiring in the steering column. Using
an ohmmeter test for continuity between the termi-
nals of the wiper switch. Refer to Group 8T Turn Sig-
nal and Hazard Warning Systems, Multi-Function
Switch Diagnosis and Testing.
REMOVAL AND INSTALLATION
WINDSHIELD WIPER ARM(S)
REMOVAL
(1) Place the wiper arm/blades in the PARK posi-
tion and turn ignition OFF.
(2) Using a trim stick (special tool #C-4755), gently
pry up on arm cap and remove.
(3) Remove wiper arm retaining nut.
(4) Remove the arm from the pivot using a rocking
motion while the arm is in an over/centered position.
(5) Clean metal splinters OFF the pivot shafts.
INSTALLATION
For installation reverse above procedures. Before
installation activate wiper system to ensure the
wiper module is in the PARK position. Position wiper
arms so that the heel of the blade(s) is on the park
line on the windshield. Refer to Adjustments in this
section for Wiper Arm Adjustment.
WINDSHIELD WIPER BLADE(S)
REMOVAL
(1) Lift wiper arm to the over center position.
(2) Remove blade assembly from arm by pushing
release tab under arm tip and slide blade away from
arm tip (Fig. 5).
(3) Gently place wiper arm tip on glass surface.
INSTALLATION
For installation, reverse the above procedures.
WINDSHIELD WIPER BLADE ELEMENT
REMOVAL
(1) Lift wiper arm to raise blade off glass.
(2) Remove blade assembly from arm by pushing
release tab under arm tip and slide blade away from
arm tip (Fig. 5). Gently place wiper arm tip on glass
surface.
(3) Remove wiping element from blade assembly.
Pull stopper of the rubber element out of the end
claw together with vertebrae (metal rails) (Fig. 6).
INSTALLATION
For installation, reverse the above procedures.
Check that the element and vertebrae are through
all claws and the final claw is locked in the stopper.
WINDSHIELD WIPER LINKAGE
REMOVAL
(1) Remove wiper module. Refer to Windshield
Wiper Module Removal and Installation in this sec-
tion.
(2) With wiper module on bench, disconnect wiper
arm linkage by inserting a screwdriver or equivalent
between ball cap and linkage. Then twist and lift
straight up on linkage.
INSTALLATION
For installation, reverse the above procedures.
Using pliers or your hand, press the ball cap straight
on to the ball stud.
Fig. 5 Windshield Wiper Blade and Element
1 ± ARM RELEASE TAB
2 ± VERTABRA
3 ± RUBBER ELEMENT
Fig. 6 Wiper Blade and Element
1 ± CLAW
2 ± TO GRASP AND PULL
3 ± CHANNEL
4 ± RUBBER ELEMENT
5 ± VERTABRA
PLWINDSHIELD WIPER and WASHER SYSTEMS 8K - 5
DIAGNOSIS AND TESTING (Continued)

WINDSHIELD WIPER MODULE
REMOVAL
(1) Disconnect and isolate the battery negative
cable (Fig. 7).
(2) Remove wiper arms and blades. Refer to Wind-
shield Wiper Arm Removal and Installation in this
section.
(3) Remove the left side cowl cover. Refer to Group
23 Body, Cowl Cover Removal and Installation.
(4) Disconnect motor posi-lock harness connector.
(5) Remove windshield wiper module mounting
screws and remove module from vehicle.
INSTALLATION
For installation, reverse the above procedures.
Tighten the mounting screws to 7 to 9 N´m (60 to 80
in. lbs.) torque.
WINDSHIELD WIPER MOTOR
REMOVAL
(1) Remove windshield wiper module. Refer to
Windshield Wiper Module Removal and Installation
in this section.(2) Remove linkage from motor crank. Insert
screwdriver or equivalent between crank and linkage
then twist and lift straight up on linkage.
(3) Remove three motor mounting screws and sep-
arate motor from linkage.
INSTALLATION
For installation add unilube grease to socket and
reverse the above procedures. Tighten the motor
mounting screws to 5 to 6 N´m (45 to 55 in. lbs.)
torque. Tighten drive link nut to 11 to 12 N´m (98 to
106 in. lbs.) torque.
WINDSHIELD WIPER/WASHER SWITCH
To service the wiper switch, refer to Group 8J Turn
Signal and Hazard Warning Systems, Multi-Function
Switch Removal and Installation.
CLEANING AND INSPECTION
WINDSHIELD WIPER BLADE(S)
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 recommended
to remove the accumulation of salt and road grime.
The wiper blades, arms and windshield should be
cleaned with a sponge or cloth and a mild detergent
or nonabrasive cleaner. If the wiper blades continue
to streak or smear, they should be replaced. The
wiper blade should run smoothly across the wind-
shield in both directions. The wiper blade should
slightly roll over center when the blade reverses
direction. A wiper blade insert that has lost flexibility
or a wiper arm that has lost spring tension, will
cause the blade to skip or chatter across the wind-
shield. If the wiper blades are new and the wiper
arm spring tension is OK and a chattering sound is
emitted from the wiper(s), the wiper blade is not roll-
ing over center. If this condition exists, refer to
Adjustments, Wiper Arm Adjustment in this section.
ADJUSTMENTS
WINDSHIELD WIPER ARM(S)
(1) Cycle the wiper motor into the PARK position.
(2) Lift the wiper blade off the windshield and
release it.
(3) The wiper blade heel should be parked within 5
mm of the park line. The park line is mark on the
windshield (Fig. 9).
(4) In the event that the wiper blade tip exces-
sively strikes the cowl screen due to long term nor-
mal wear, reposition the wiper blade heel slightly
above the park line. Make sure that the wipers are
in the PARK position.
Fig. 7 Battery Negative Cable Remove/Install
1 ± NEGATIVE CABLE
2 ± NEGATIVE BATTERY POST
8K - 6 WINDSHIELD WIPER and WASHER SYSTEMSPL
REMOVAL AND INSTALLATION (Continued)