Page 510 of 4284

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Install a known good relay in place of the park lamp relay.
Turn the Park Lamps On.
Do the Park Lamps operate normally?All
Ye s®Replace the Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off
Remove the Park Lamp Relay.
Measure the voltage of the Fused B+ circuit of the park lamp relay.
Is the voltage above 10 volts?All
Ye s®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the Front Control Module from the IPM.
Remove the Park Lamp Relay.
Measure the resistance of the Park Lamp Relay Control Circuit.
Is the resistance below 5.0 ohms?All
Ye s®The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Right Front Fused Park Lamp Relay Output circuit for
an open condition.
Perform BODY VERIFICATION TEST - VER 1.
481
EXTERIOR LIGHTING
PARK LAMP OUTPUT 1 OPEN ÐContinued
Page 512 of 4284

Symptom:
PARK LAMP OUTPUT 2 OPEN
When Monitored and Set Condition:
PARK LAMP OUTPUT 2 OPEN
When Monitored: Ignition on.
Set Condition: The IPM detects high current from the Park Lamp Relay Control circuit.
POSSIBLE CAUSES
MISSING RELAY
OPEN FUSE
PARK LAMP RELAY
INTERMITTENT CONDITION
LEFT FRONT FUSED PARK LAMP RELAY OUTPUT CIRCUIT OPEN
FRONT CONTROL MODULE
INTELLIGENT POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all IPM DTC's.
Turn the Park Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIItread: Park Lamp Output 2 OpenAll
Ye s®Go To 2
No®Go To 6
2 Turn the ignition off.
Check the IPM to make certain the Park Lamp Relay is present.
Is the Park Lamp Relay present?All
Ye s®Go To 3
No®Replace the missing Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Check the IPM Park Lamp fuse #2.
Is the fuse open?All
Ye s®Replace the open fuse.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
483
EXTERIOR LIGHTING
Page 513 of 4284

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Install a known good relay in place of the park lamp relay.
Turn the Park Lamps On.
Do the Park Lamps operate normally?All
Ye s®Replace the Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off
Remove the Park Lamp Relay.
Measure the voltage of the Fused B+ circuit of the park lamp relay.
Is the voltage above 10 volts?All
Ye s®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the Front Control Module from the IPM.
Remove the Park Lamp Relay.
Measure the resistance of the Park Lamp Relay Control Circuit.
Is the resistance below 5.0 ohms?All
Ye s®The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Left Front Fused Park Lamp Relay Output Circuit for
an open condition.
Perform BODY VERIFICATION TEST - VER 1.
484
EXTERIOR LIGHTING
PARK LAMP OUTPUT 2 OPEN ÐContinued
Page 535 of 4284

Symptom:
RIGHT SIDE PARK LAMP OPEN
When Monitored and Set Condition:
RIGHT SIDE PARK LAMP OPEN
When Monitored: Anytime the FCM is active.
Set Condition: When B+ voltage is below 10.0 volts.
POSSIBLE CAUSES
INTERMITTENT CONDITION
GROUND CIRCUIT
PARK LAMP
PARK LAMP FUSE #3
PARK LAMP OUTPUT CIRCUIT OPEN
PARK LAMP RELAY
FRONT CONTROL MODULE
INTELLIGENT POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all IPM DTC's.
Turn the Park Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIItread: Right Side Park Lamp Fuse Outage?All
Ye s®Go To 2
No®The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off
Disconnect the right front Park Lamp harness connector.
Using a 12-volt test light connected to 12-volts, check the ground circuit.
Does the test light illuminate brightly?All
Ye s®Go To 3
No®Repair the Ground Circuit.
Perform BODY VERIFICATION TEST - VER 1.
506
EXTERIOR LIGHTING
Page 536 of 4284

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the right front park lamp connector.
Turn the ignition on.
Turn the Park Lamps on.
Using a 12-volt test light connected to ground, check the Park Lamp Output circuit.
Does the test light illuminate brightly?All
Ye s®Replace the Park Lamp.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
4 Turn the ignition off.
Check the IPM Park Lamp Fuse #3.
Is the Fuse open?All
Ye s®Replace the Park Lamp Fuse #3.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Install a known good relay in place of the Park Lamp Relay.
Turn the Park Lamps on.
Do the Park Lamps operate normally?All
Ye s®Replace the Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the IPM harness connector.
Measure the resistance of the Park Lamp Output circuit to ground.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Park Lamp Output circuit for an open condition.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 7
7 Turn the ignition off.
Remove the Park Lamp Relay.
Measure the voltage of the Fused B+ circuit of the Park Lamp Relay.
Is the voltage above 10.0 volts?All
Ye s®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
507
EXTERIOR LIGHTING
RIGHT SIDE PARK LAMP OPEN ÐContinued
Page 609 of 4284

Symptom:
LEFT TURN SIGNAL INDICATOR OPEN (HIGHLINE)
When Monitored and Set Condition:
LEFT TURN SIGNAL INDICATOR OPEN (HIGHLINE)
When Monitored: With the ignition on.
Set Condition: The BCM detects an open in the Left Turn Indicator Driver.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUSED B+ CIRCUIT
MESSAGE CENTER OPERATION
LEFT TURN INDICATOR DRIVER SHORTED TO GROUND
LEFT TURN INDICATOR DRIVER OPEN
BCM
TEST ACTION APPLICABILITY
1 Turn the ignition on.
Monitor the Left Turn Signal Indicator.
Operate the Left Turn Signal.
Is the Indicator lamp operating correctly?All
Ye s®Go To 2
No®Go To 3
2WARNING: 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.
580
INSTRUMENT CLUSTER
Page 610 of 4284

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
Page 611 of 4284

Symptom:
LEFT TURN SIGNAL INDICATOR OPEN (LOWLINE)
When Monitored and Set Condition:
LEFT TURN SIGNAL INDICATOR OPEN (LOWLINE)
When Monitored: With the ignition on.
Set Condition: The BCM detects an open in the Left Turn Indicator Driver.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUSED B+ CIRCUIT
INSTRUMENT CLUSTER OPERATION
LEFT TURN INDICATOR DRIVER SHORTED TO GROUND
LEFT TURN INDICATOR DRIVER OPEN
BCM
TEST ACTION APPLICABILITY
1 Turn the ignition on.
Monitor the Left Turn Signal Indicator.
Operate the Left Turn Signal.
Is the Indicator lamp operating correctly?All
Ye s®Go To 2
No®Go To 3
2WARNING: 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.
582
INSTRUMENT CLUSTER