Symptom:
FCM-LEFT STOP LAMP OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT BRAKE LAMP FEED CIRCUIT OPEN
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Actuate the Stop Lamps.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Left Stop Lamp Output Circuit Open?
All
Yes → 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 IPM C3 harness connector
Measure the resistance of the Left Brake Lamp Feed circuit.
Is the resistance above 5.0 ohms?
All
Yes → Repair the Left Brake Lamp Feed circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Turn the ignition off
Disconnect the FCM from the IPM.
Disconnect the IPM C3 harness connector.
Measure the resistance of the Left Brake Lamp Feed circuit.
Is the resistance above 5.0 ohms?
All
Yes → Replace the Power Distribution Center..
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
337
EXTERIOR LIGHTING
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