Symptom:
DOME SWITCH INPUT SHORT
When Monitored and Set Condition:
DOME SWITCH INPUT SHORT
When Monitored: Continuously
Set Condition: When the input voltage is less than 0.2 volts for over 10 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
PANEL LAMPS DIMMER SIGNAL CIRCUIT SHORT TO GROUND
MULTIFUNCTION SWITCH
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all BCM DTC’s.
Turn the Dome Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt display: Dome Switch Input 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 Multifunction Switch harness connector.
Disconnect the Body Control Module C2 connector.
Measure the resistance of the Panel Lamps Dimmer Signal Circuit to ground.
Is the resistance below 1000 ohms?
All
Yes → Repair the Panel Lamps Dimmer Signal Circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Measure the resistance of the Panel Lamps Dimmer Signal Circuit and ground.
Is the resistance below 5.0 ohms?
All
Yes → Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
289
INTERIOR LIGHTING
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