DIAGNOSIS AND TESTING - FAILED PARK
SWITCH
If the wiper park switch has failed, the windshield
wipers will operate as follows:
• SWITCH OFF - Wipers stop in current location
regardless of the park signal.
• INTERMITTENT MODE - Wipers operate con-
tinuously or at low speed for one or more extra
wipes.
• LOW SPEED - Wipers operate at low speed.
• HIGH SPEED - Wipers operate at high speed.
• WIPE AFTER WASH - Wipers operate at low
speed in any mode setting. Wipers operate only while
the wash button is depressed with switch in the OFF
mode and wipers stop in mid-cycle when button is
released.
The windshield wiper park switch and circuit is
monitored by the BCM. The park switch and circuit
can be tested using the WIPER SYSTEM DIAGNO-
SIS table.
WIPER SYSTEM DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
WIPER BLADES DO NOT
PARK PROPERLY
1. WIPER ARMS IMPROPERLY
PARKED.
1. REMOVE WIPER ARMS AND REPARK.
REFER TO WIPER ARM REMOVAL AND
INSTALLATION.
2. WIPER ARMS ARE LOOSE ON
PIVOT SHAFT.
2. REMOVE WIPER ARM AND REPARK.
REFER TO WIPER ARM REMOVAL AND
INSTALLATION.
3. MOTOR CRANK LOOSE AT
OUTPUT SHAFT.
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.
4. STRIPPED WIPER ARM HEAD. 4. REPLACE WIPER ARM.
MOTOR STOPS IN ANY
POSITION WHEN THE
SWITCH IS TURNED OFF
OPEN PARK CIRCUIT. 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 MOTOR DOES NOT PARK.
MOTOR WILL NOT STOP
WHEN THE SWITCH IS
TURNED OFF
1. FAULTY SWITCH. 1. CHECK SWITCH IN LOW, HIGH AND
INTERMITTENT POSITION.
2. LACK OF DYNAMIC BRAKE ON
WET GLASS.
2. ENSURE PARK SWITCH HAS CLEAN
GROUND.
WIPER BLADES SLAP
AGAINST COWL SCREEN
OR WINDOW MOLDINGS.
WIPER ARMS ARE PARKED
INCORRECTLY.
PARK WIPER ARMS. REFER TO WIPER
ARM ADJUSTMENT.
BLADES CHATTER 1. FOREIGN SUBSTANCE SUCH
AS POLISH ON GLASS OR
BLADES.
1. CLEAN GLASS AND BLADE ELEMENT
WITH NON-ABRASIVE CLEANER.
2. ARMS TWISTED, BLADE AT
WRONG ANGLE ON GLASS.
2. REPLACE ARM.
RS WIPERS/WASHERS 8R-3
WIPERS/WASHERS (Continued)
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