CONDITION POSSIBLE CAUSE CORRECTION
WIPER SYSTEM WILL NOT
RUN
1. PDC FUSE “M” BLOWN.
2. JUNCTION BLOCK FUSE
#5 BLOWN.
3. ON / OFF RELAY
DEFECTIVE.
4. MOTOR CONNECTOR
DEFECTIVE (LOOSE, BENT
OR CORRODED).
5. OPEN POWER CIRCUIT
TO MOTOR.
6. BCM CONNECTORS “B”
AND “C” (LOOSE, BENT OR
CORRODED).
7. OPEN OR DEFECTIVE
CONTROL CIRCUIT TO
BCM.
8. OPEN OR DEFECTIVE
MOTOR GROUND CIRCUIT.
9. OPEN CIRCUIT IN
MOTOR.
10. STRIPPED GEARS IN
MOTOR.
11. SEIZED MOTOR
BEARINGS.
1. SHORT CIRCUIT BETWEEN PDC FUSE “M”
AND ON / OFF RELAY CAVITY 9A” OR “D” OR
HI / LO RELAY CAVITY “A”. SHORT CIRCUIT IN
ON / OFF RELAY OR HI / LO RELAY. SHORT
CIRCUIT BETWEEN ON / OFF RELAY CAVITY
“B” AND HI / LO RELAY CAVITY “B”. IF NOT OK,
REPLACE ON / OFF RELAY OR REPAIR
CIRCUIT(S).
2. SHORT CIRCUIT BETWEEN JUNCTION
BLOCK FUSE #5 AND WIPER SWITCH
TERMINAL #1. SHORT IN WIPER SWITCH. IF
NOT OK, REPAIR CIRCUIT OR REFER TO
WIPER SWITCH DIAGNOSTIC PROCEDURES.
3. CHECK WITH A KNOWN GOOD RELAY. IF
NOT OK, REPLACE RELAY.
4. CHECK MOTOR CONNECTOR FOR BENT,
LOOSE, OR CORRODED CONNECTOR.
5. OPEN OR DEFECTIVE CIRCUIT BETWEEN
PDC FUSE “M” AND ON / OFF RELAY CAVITY
“A” OR “D”. OPEN OR DEFECTIVE CIRCUIT
BETWEEN ON / OFF RELAY CAVITY “B” AND
HI / LO RELAY CAVITY “B”. IF NOT OK,
REPLACE ON / OFF RELAY OR REPAIR
CIRCUIT(S).
6. CHECK BCM CONNECTORS “B” AND “C”
FOR BENT, LOOSE, OR CORRODED
CONNECTORS.
7. OPEN OR DEFECTIVE CIRCUIT BETWEEN
ON / OFF RELAY CAVITY “C9 AND BCM
CONNECTOR TERMINAL #4C. OPEN OR
DEFECTIVE CIRCUIT BETWEEN WIPER
SWITCH TERMINAL #5 AND BCM
CONNECTOR TERMINAL #5B. DEFECTIVE
BCM. IF NOT OK, REPAIR CIRCUIT(S) OR
REFER TO BCM DIAGNOSTIC PROCEDURES.
8. OPEN OR DEFECTIVE CIRCUIT BETWEEN
WIPER MOTOR CONNECTOR GROUND
TERMINAL #5 AND LEFT HEADLAMP GROUND
#5 OR ENGINE GROUND #1 OR 2.
9. CHECK FOR OPEN CIRCUIT IN MOTOR
BETWEEN LO SPEED TERMINAL #2 AND
GROUND TERMINAL #5 OR BETWEEN HI
SPEED TERMINAL #1 AND GROUND
TERMINAL #5. IF NOT OK, REPLACE WIPER
MOTOR.
10. APPLY BATTERY VOLTAGE TO MOTOR HI
SPEED OR LO SPEED CIRCUIT. IF MOTOR
RUNS AND OUTPUT CRANK RUNS
INTERMITTENTLY OR DOES NOT RUN,
REPLACE MOTOR.
11. APPLY BATTERY VOLTAGE TO MOTOR HI
SPEED OR LO SPEED CIRCUIT. IF MOTOR
DOES NOT RUN, REPLACE MOTOR.
LH WIPER AND WASHER SYSTEMS 8K - 11
DIAGNOSIS AND TESTING (Continued)
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