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Symptom:
DOME SWITCH INPUT SHORT-BCM
INTERMITTENT CONDITION
PANEL LAMPS DIMMER SIGNAL CIRCUIT SHORT TO GROUND
HEADLAMP SWITCH
BODY CONTROL MODULE
TEST
1
Turn the ignition on.
With the DRBIII , clear all BCM DTC's.
Turn the Dome Lamps on.
With the DRBIII , read the DTC information.
Does the DRBIII display: Dome Switch Input Short?
Yes → Go To 2
→ The condition that caused the symptom is currently not present.
No
2
Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Disconnect the Body Control Module C5 connector.
Measure the resistance of the Panel Lamps Dimmer Signal Circuit to ground.
Is the resistance below 1000 ohms?
Yes → Repair the Panel Lamps Dimmer Signal Circuit for a short to
→ Go To 3
No
3
Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Measure the resistance of the Panel Lamps Dimmer Signal Circuit and the
Headlamp Switch MUX Return Circuit to ground.
Is the resistance below 1000 ohms?
Yes → Replace the Headlamp Switch.
→ Replace the Body Control Module.
No
POSSIBLE CAUSES
ACTION
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.
ground.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
INTERIOR LIGHTING
649
APPLICABILITY
All
All
All
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