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 514 of 4284

Symptom:
PARK LAMP OUTPUT 2 SHORT TO BATTERY
When Monitored and Set Condition:
PARK LAMP OUTPUT 2 SHORT TO BATTERY
When Monitored: Ignition on.
Set Condition: When a battery fault condition is present.
POSSIBLE CAUSES
INTERMITTENT CONDITION
PARK LAMP RELAY
FRONT CONTROL MODULE
INTELLIGENT POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC's.
Turn the Park Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIItread: Park Lamp Output 2 Short to BATTAll
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.
Remove and install a known good relay in place of the Park Lamp Relay.
Do the Park Lamps operate normally?All
Ye s®Replace the Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition off.
Remove the Park Lamp Relay from the IPM.
Remove the Front Control Module from the IPM.
Measure the voltage of the Park Lamp Relay Control circuit and ground.
Is the voltage above 1.0 volts?All
Ye s®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
485
EXTERIOR LIGHTING
Page 515 of 4284

Symptom:
RIGHT FRONT TURN SIGNAL OUTPUT OPEN
When Monitored and Set Condition:
RIGHT FRONT TURN SIGNAL OUTPUT OPEN
When Monitored: Ignition On.
Set Condition: When the output voltage status is LOW.
POSSIBLE CAUSES
INTERMITTENT CONDITION
GROUND CIRCUIT
TURN SIGNAL LAMP
RIGHT FRONT TURN SIGNAL OUTPUT CIRCUIT OPEN
RIGHT FRONT TURN SIGNAL DRIVER CIRCUIT OPEN
BODY CONTROL MODULE
INTELLIGENT POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all BCM DTC's.
Actuate the Turn Signals.
With the DRBIIIt, read the DTC information.
Does the DRBIIItread: Right Front Turn Signal Output Open?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 Turn Signal 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.
486
EXTERIOR LIGHTING
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TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Right Turn Signal Lamp connector.
Turn the ignition on.
Turn the Right Turn Signal on.
Using a 12-volt test light connected to ground, check the Right Front Turn Signal
Output circuit.
Does the test light illuminate brightly?All
Ye s®Replace the Turn Signal Lamp.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
4 Turn the ignition off.
Disconnect the IPM C2 harness connector.
Measure the resistance of the Right Front Turn Signal Output Circuit and ground.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Right Front Turn Signal Output Circuit for an open
condition.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Body Control Module C2 connector.
Measure the resistance of the Right Front Turn Signal Driver Circuit to ground.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Right Front Turn Signal Driver Circuit for an open
condition.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Disconnect the IPM C8 harness connector.
Measure the resistance of the Right Front Turn Signal Driver Circuit and ground.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
487
EXTERIOR LIGHTING
RIGHT FRONT TURN SIGNAL OUTPUT OPEN ÐContinued
Page 517 of 4284

Symptom:
RIGHT FRONT TURN SIGNAL OUTPUT SHORT
When Monitored and Set Condition:
RIGHT FRONT TURN SIGNAL OUTPUT SHORT
When Monitored: Anytime the IPM is active.
Set Condition: When output voltage status is Low.
POSSIBLE CAUSES
INTERMITTENT CONDITION
RIGHT FRONT TURN SIGNAL OUTPUT SHORT TO GROUND
TURN SIGNAL LAMP
INTELLIGENT POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all IPM DTC's.
Actuate the Turn Signals.
With the DRBIIIt, read the DTC information.
Does the DRBIIItread: Right Front Turn Signal Output Short?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 Turn Signal Lamp connector.
Disconnect the IPM harness connector.
Measure the resistance between the Right Front Turn Signal Output circuit and
ground.
Is the resistance below 100.0 ohms?All
Ye s®Repair the Right Front Turn Signal Output circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
488
EXTERIOR LIGHTING
Page 518 of 4284
TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Right Front Turn Signal Lamp connector.
Turn the ignition on.
Turn the Right Turn Signal on.
Using a 12-volt test light connected to ground, check the Right Front Turn Signal
Output circuit.
Does the test light illuminate brightly?All
Ye s®Replace the Turn Signal Lamp.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
489
EXTERIOR LIGHTING
RIGHT FRONT TURN SIGNAL OUTPUT SHORT ÐContinued
Page 519 of 4284

Symptom:
RIGHT HIGH BEAM HEADLAMP CIRCUIT OPEN
POSSIBLE CAUSES
FRONT CONTROL MODULE
GROUND CIRCUIT OPEN
RIGHT HEADLAMP
RIGHT HIGH BEAM DRIVER CIRCUIT OPEN
WIRING HARNESS INSPECTION
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase the Front Control Module DTC's.
Turn the headlamps on.
Switch the headlamps between high beam and low beam several times, pausing for
5 seconds in each position.
With the DRB, read Front Control Module DTC's.
Is this DTC present?All
Ye s®Go To 2
No®Go To 5
2 Turn the ignition off.
Disconnect the Right Headlamp harness connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit.
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®Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Right Headlamp.
Disconnect the Front Control Module from the Intelligent Power Module.
Measure the resistance of the Right High Beam Driver circuit.
Is the resistance below 10.0 ohms?All
Ye s®Go To 4
No®Repair the Right High Beam Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
490
EXTERIOR LIGHTING
Page 520 of 4284

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Right Headlamp harness connector.
Using a 12-volt test light connected to ground, check the Right High Beam Driver
circuit in the Right Headlamp harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Turn the high beam headlamps on.
Does the test light illuminate brightly?All
Ye s®Replace the Right Headlamp Bulb.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
NOTE: Visually inspect the related wiring harness and circuits. Look for
any chafed, pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?All
Ye s®Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
491
EXTERIOR LIGHTING
RIGHT HIGH BEAM HEADLAMP CIRCUIT OPEN ÐContinued