WIPER MOTOR DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
WIPER BLADES DO NOT
PARK PROPERLY.
(1) WIPER ARMS
IMPROPERLY PARKED.
(1) REMOVE WIPER ARMS AND REPARK.
REFER TO ELECTRICAL, WIPERS/WASHERS,
WIPER ARM, REMOVAL.
(2) WIPER ARMS ARE LOOSE
ON PIVOT SHAFT.
(2) REMOVE WIPER ARM AND REPARK.
REFER TO ELECTRICAL, WIPERS/WASHERS,
WIPER ARM, REMOVAL.
(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.
MOTOR STOPS IN ANY
POSITION WHEN THE
SWITCH IS TURNED OFF.
(1) OPEN PARK CIRCUIT.
(1) CHECK PARK SWITCH BY
DISCONNECTING THE WIRE CONNECTOR.
PLACE A JUMPER WIRE FROM PIN 2 TO PIN
4. APPLY BATTERY VOLTAGE TO PIN 3 AND
THEN TO PIN 1. REPLACE MOTOR IF IT
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.
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.
(1) CLEAN GLASS AND BLADE ELEMENT
WITH NON-ABRASIVE CLEANER.
(2) ARMS TWISTED, BLADE
AT WRONG ANGLE ON
GLASS.
(2) REPLACE ARM.
(3) BLADE STRUCTURE
BENT.
(3) REPLACE BLADE.
(4) BLADE ELEMENT HAS
PERMANENT SET.
(4) REPLACE BLADE ELEMENT.
WIPER KNOCK AT
REVERSAL.
(1) LINKAGE BUSHINGS
WORN.
(1) REPLACE WORN LINK. REFER TO
ELECTRICAL, WIPERS/WASHERS, WIPER
LINKAGE, REMOVAL.
(2) ARMATURE ENDPLAY IN
MOTOR.
(2) REPLACE WIPER MOTOR. REFER TO
ELECTRICAL, WIPERS/WASHERS, WIPER
MOTOR REMOVAL.
8R - 10
WIPERS/WASHERS
PT
FRONT WIPER MOTOR (Continued)