Symptom:
COURTESY LAMP OUTPUT SHORT
When Monitored and Set Condition:
COURTESY LAMP OUTPUT SHORT
When Monitored: When output is ON.
Set Condition: When output is ON and device current limits.
POSSIBLE CAUSES
INTERMITTENT CONDITION
COURTESY LAMP DRIVER CIRCUIT SHORT
BODY CONTROL MODULE
REARVIEW MIRROR
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all BCM DTC’s.
Turn the courtesy lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Courtesy Lamp Output Short?
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 Rearview Mirror harness connector.
Disconnect the Body Control Module C3 harness connector.
Measure the resistance of the Courtesy Lamp Driver circuit.
Is the resistance below 5.0 ohms?
All
Yes → Repair the Courtesy Lamp Driver circuit for a short condition.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Turn the ignition off.
Disconnect the Body Control Module C3 harness connector.
Measure the resistance of the Courtesy Lamp Driver circuit.
Is the resistance below 5.0 ohms?
All
Yes → Replace the Rearview Mirror assembly.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
287
INTERIOR LIGHTING
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