Symptom:
DOME SWITCH INPUT OPEN
When Monitored and Set Condition:
DOME SWITCH INPUT OPEN
When Monitored: Continuously
Set Condition: When the input voltage is greater than 4.8 volts for over 10 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
PANEL LAMPS DIMMER SIGNAL CIRCUIT OPEN
BODY CONTROL MODULE
MULTIFUNCTION SWITCH
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 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 Body Control Module C2 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance of the Panel Lamps Dimmer Signal Circuit.
Is the resistance below 5.0 ohms?
All
Yes → Go To 3
No → Repair the Panel Lamps Dimmer Signal Circuit for an open
condition.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Measure the voltage of the Panel Lamps Dimmer Signal circuit.
Is the voltage below 4.8 volts?
All
Yes → Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
288
INTERIOR LIGHTING
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