Page 1001 of 4284
TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Multi-Function Switch harness connector.
Disconnect the BCM C5 harness connector.
Measure the between the Front Wiper Switch MUX circuit and the Multi-Function
Switch MUX Return circuit.
Is the resistance below 1000.0 ohms?All
Ye s®Repair the Front Wiper Switch MUX circuit for a short to the
Multi-Function Switch MUX Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Multi-Function Switch harness connector.
Turn the ignition on.
With the DRB, read the Front Wiper Sw volts?
Is the voltage above 4.5 volts?All
Ye s®Replace the Multi-Function Switch.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
972
WINDSHIELD WIPER & WASHER
FRONT WIPER SWITCH MUX INPUT SHORT TO GROUND ÐContinued
Page 1002 of 4284

Symptom:
HEADLAMP WASHER RELAY OPEN
POSSIBLE CAUSES
OPEN GROUND CIRCUIT
FUSED B+ CIRCUIT OPEN
HEADLAMP WASHER RELAY CONTROL CIRCUIT OPEN
HEADLAMP WASHER RELAY OUTPUT CIRCUIT OPEN
HEADLAMP WASHER PUMP MOTOR
HEADLAMP WASHER RELAY
FRONT CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Washer Pump connector.
Measure the resistance of the Washer Pump ground circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 2
No®Repair the open Washer Pump ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
Disconnect the Headlamp Washer Relay.
Measure the voltage of the Fused B+ Circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 3
No®Repair the Fused B+ Circuit for an open condition.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Headlamp Washer Relay.
Disconnect the FCM harness connector.
Measure the resistance of the Headlamp Washer Relay Control Circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the Headlamp Washer Relay Control Circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Disconnect the Headlamp Washer Relay.
Disconnect the Headlamp Washer Pump Motor.
Measure the resistance of the Headlamp Washer Relay Output Circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 5
No®Repair the Headlamp Washer Relay Output Circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
973
WINDSHIELD WIPER & WASHER
Page 1003 of 4284
TEST ACTION APPLICABILITY
5 Turn the ignition on.
Disconnect the Headlamp Washer Pump Motor connector.
Actuate the washers.
Measure the voltage of the Washer Pump Output Circuit.
Is the voltage above 10.0 volts?All
Ye s®Replace the Headlamp Washer Pump Motor.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Install a known good relay in place of the Headlamp Washer Relay.
Turn the Washers on.
Do the Headlamp Washers operate normally?All
Ye s®Replace the Headlamp Washer Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
974
WINDSHIELD WIPER & WASHER
HEADLAMP WASHER RELAY OPEN ÐContinued
Page 1004 of 4284

Symptom:
HEADLAMP WASHER RELAY SHORT TO BATT
POSSIBLE CAUSES
FUSED B+ CIRCUIT OPEN
HEADLAMP WASHER RELAY CONTROL CIRCUIT OPEN
HEADLAMP WASHER PUMP MOTOR
HEADLAMP WASHER RELAY
FRONT CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
Disconnect the Headlamp Washer Relay.
Measure the voltage of the Fused B+ Circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 2
No®Repair the Fused B+ Circuit for an open condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Headlamp Washer Relay.
Disconnect the FCM harness connector.
Measure the resistance of the Headlamp Washer Relay Control Circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the Headlamp Washer Relay Control Circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition on.
Disconnect the Headlamp Washer Pump Motor connector.
Actuate the washers.
Measure the voltage of the Washer Pump Output Circuit.
Is the voltage above 10.0 volts?All
Ye s®Replace the Headlamp Washer Pump Motor.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
4 Turn the ignition off.
Install a known good relay in place of the Headlamp Washer Relay.
Turn the Washers on.
Do the Headlamp Washers operate normally?All
Ye s®Replace the Headlamp Washer Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
975
WINDSHIELD WIPER & WASHER
Page 1005 of 4284

Symptom:
REAR WASH SWITCH INPUT STUCK
When Monitored and Set Condition:
REAR WASH SWITCH INPUT STUCK
When Monitored: Ignition ON
Set Condition: Switch is applied for more than 10 seconds.
POSSIBLE CAUSES
REAR WASHER SWITCH STUCK
INTERMITTENT WIRING AND CONNECTORS
REAR WASHER SWITCH MUX CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, select Body, Front Control Module and read the R Washer Switch
state.
Does the DRB display switch state as Closed?All
Ye s®Go To 2
No®Go To 4
2 Turn the ignition off.
Disconnect the Rear Washer Switch harness connector.
Turn the ignition on.
With the DRB, select Body, Front Control Module and read the R Washer Switch
state.
Does the DRB display switch state as Open?All
Ye s®Replace the Rear Washer Switch in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition off.
Disconnect the Rear Washer Switch harness connector.
Disconnect the BCM harness connector.
Measure the resistance between ground and the Rear Washer Switch MUX circuit.
Is the resistance below 1000.0 ohms?All
Ye s®Repair the Rear Washer Switch MUX circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
976
WINDSHIELD WIPER & WASHER
Page 1006 of 4284
TEST ACTION APPLICABILITY
4 Turn the ignition on.
With the DRBIIIt, erase all BCM and FCM DTCs.
Turn the ignition off.
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?All
Ye s®Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
977
WINDSHIELD WIPER & WASHER
REAR WASH SWITCH INPUT STUCK ÐContinued
Page 1007 of 4284
Symptom:
REAR WASHER OUTPUT OPEN
When Monitored and Set Condition:
REAR WASHER OUTPUT OPEN
When Monitored: Ignition on.
Set Condition:
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
FUSED ACCESSORY RELAY OUTPUT CIRCUIT
REAR WASHER MOTOR CONTROL CIRCUIT OPEN
REAR WASHER MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE
REAR WASHER PUMP MOTOR
FRONT CONTROL MODULE
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
Press the Rear Washer Switch.
Does the Rear Washer Motor Function?All
Ye s®Go To 2
No®Go To 3
2 Turn the ignition on.
With the DRBIIIt, erase all BCM and FCM DTCs.
Turn the ignition off.
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?All
Ye s®Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
978
WINDSHIELD WIPER & WASHER
Page 1008 of 4284

TEST ACTION APPLICABILITY
3 Turn the ignition off to the lock position.
Disconnect the Rear Washer Pump Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Fused Accessory Relay
Output circuit in the Rear Washer Pump Motor harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused Accessory Relay Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off to the lock position.
Disconnect the Rear Washer Pump Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Using a 12-volt test light connected to 12 Volts, check the Rear Washer Pump Motor
Control circuit in the Rear Washer Pump Motor harness connector while pressing the
Rear Washer Switch.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Replace the Rear Washer Pump Motor in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off to the lock position.
Disconnect the Front Control Module harness connector.
Disconnect the Rear Washer Pump Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Rear Washer Pump Motor Control Circuit from the
Front Control Module connector to the Rear Washer Pump Motor harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Rear Washer Pump Motor Control Circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off to the lock position.
Disconnect the Front Control Module connector.
Disconnect the Rear Washer Pump Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Rear Washer Pump Motor
Control circuit.
Does the test light illuminate brightly?All
Ye s®Repair the Rear Washer Pump Motor Control Circuit for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
979
WINDSHIELD WIPER & WASHER
REAR WASHER OUTPUT OPEN ÐContinued