
TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the BCM C4 harness connector.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Instrument Cluster Wake
Up Sense circuit.
Is the test light illuminated?All
Ye s®Repair the Instrument Cluster Wake Up Sense circuit for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
4WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?All
Ye s®Repair as necessary
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
579
INSTRUMENT CLUSTER
IOD WAKEUP CLUSTER OUTPUT SHORT ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the
Message Center harness connector.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused B+ circuit.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, probe the Left Indicator Driver circuit
in the Message Center harness connector.
Operate the Multi-Function Switch and turn the Left Indication on.
Does the test light flash on and off?All
Ye s®Remove and inspect the Bulb. If OK, replace the Message Center.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Message Center harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Left Turn Indicator Driver circuit at the Message
Center harness connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Left Turn Indicator for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the Message Center harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Left Turn Indicator Driver circuit between the BCM
harness connector and the Message Center harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the Left Turn Indicator for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 If there are no possible causes remaining, view repair? All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
581
INSTRUMENT CLUSTER
LEFT TURN SIGNAL INDICATOR OPEN (HIGHLINE) ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the
Instrument Cluster harness connector.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused B+ circuit.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, probe the Left Indicator Driver circuit
in the Instrument Cluster harness connector.
Operate the Multi-Function Switch and turn the Left Indication on.
Does the test light flash on and off?All
Ye s®Remove and inspect the Bulb. If OK, replace the Instrument
Cluster printed circuit board.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Left Turn Indicator Driver circuit at the Instrument
Cluster harness connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Left Turn Indicator for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Left Turn Indicator Driver circuit between the BCM
harness connector and the Instrument Cluster harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the Left Turn Indicator for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 If there are no possible causes remaining, view repair? All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
583
INSTRUMENT CLUSTER
LEFT TURN SIGNAL INDICATOR OPEN (LOWLINE) ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the
Message Center harness connector.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused B+ circuit.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, probe the Left Indicator Driver circuit
in the Message Center harness connector.
Operate the Multi-Function Switch and turn the Left Indication on.
Does the test light flash on and off?All
Ye s®Remove and inspect the bulb. If OK, replace the Message Center.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Message Center harness connector.
Disconnect the BCM C4 harness connector.
Turn the ignition on.
Measure the voltage of the Left Turn Indicator Driver circuit at the Message Center
harness connector.
Is the voltage above 1.0 volts?All
Ye s®Repair the Left Turn Indicator for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair? All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
585
INSTRUMENT CLUSTER
LEFT TURN SIGNAL INDICATOR SHORT (HIGHLINE) ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the
Instrument Cluster harness connector.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused B+ circuit.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, probe the Left Indicator Driver circuit
in the Instrument Cluster harness connector.
Operate the Multi-Function Switch and turn the Left Indication on.
Does the test light flash on and off?All
Ye s®Remove and inspect the bulb. If OK, replace the Instrument
Cluster printed circuit board.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the BCM C4 harness connector.
Measure the voltage of the Left Turn Indicator Driver circuit at the Instrument
Cluster harness connector.
Is the voltage above 1.0 volts?All
Ye s®Repair the Left Turn Indicator for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair? All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
587
INSTRUMENT CLUSTER
LEFT TURN SIGNAL INDICATOR SHORT (LOWLINE) ÐContinued

Symptom:
REAR FOG INDICATOR OUTPUT OPEN
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
REAR FOG LAMP INDICATOR CIRCUIT OPEN
REAR FOG LAMP INDICATOR GROUND CIRCUIT OPEN
REAR FOG LAMP INDICATOR CIRCUIT SHORT TO VOLTAGE
HEADLAMP SWITCH
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase Body Control Module DTC's.
Turn the ignition off, wait 15 seconds, then turn the ignition on.
Turn on the Rear Fog Lamps.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay REAR FOG LAMP INDICATOR OPEN?All
Ye s®Go To 2
No®Go To 8
2 Turn the ignition off to the lock position.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Turn ON the Rear Fog Lamps.
Using a 12-volt test light connected to ground, back probe the Rear Fog Lamp
Indicator circuit in the Headlamp Switch 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 3
No®Go To 6
3 Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Rear Fog Lamp Indicator Ground circuit from the Body
Control Module harness connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Rear Fog Lamp Indicator Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
600
INSTRUMENT CLUSTER

Symptom:
REAR FOG INDICATOR OUTPUT SHORT
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
REAR FOG LAMP INDICATOR CIRCUIT SHORT TO GROUND
HEADLAMP SWITCH
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase Body Control Module DTC's.
Turn the ignition off, wait 15 seconds, then turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay REAR FOG LAMP INDICATOR SHORT TO GROUND?All
Ye s®Go To 2
No®Go To 6
2 Turn the ignition off to the lock position.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Turn ON the Rear Fog Lamps.
Using a 12-volt test light connected to ground, back probe the Rear Fog Lamp
Indicator circuit in the Headlamp Switch 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 3
No®Go To 4
3 If there are no possible causes remaining, view repair. All
Repair
Replace the Headlamp Switch.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Rear Fog Lamp Indicator circuit.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Rear Fog Lamp Indicator circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 If there are no possible causes remaining, view repair. All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
602
INSTRUMENT CLUSTER

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the
Message Center harness connector.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Repair the Fused B+ circuit.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Message Center harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, probe the Right Indicator Driver
circuit in the Message Center harness connector.
Operate the Multi-Function Switch and turn the Right Indication on.
Does the test light flash on and off?All
Ye s®Remove and inspect the Bulb. If OK, replace the Message Center.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Message Center harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Right Turn Indicator Driver circuit at the Message
Center harness connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Right Turn Indicator for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the Message Center harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Right Turn Indicator Driver circuit between the BCM
harness connector and the Message Center harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the Right Turn Indicator for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 If there are no possible causes remaining, view repair? All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
605
INSTRUMENT CLUSTER
RIGHT TURN SIGNAL INDICATOR OPEN (HIGHLINE) ÐContinued