Symptom:
*INSTRUMENT CLUSTER DIMMING INOPERATIVE
POSSIBLE CAUSES
DTC PRESENT
HEADLAMP SWITCH OUTPUT CIRCUIT OPEN
ILLUMINATION BULB
INSTRUMENT CLUSTER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIIt display Panel Dimmer Open?
All
Yes → Refer to the Service Information to diagnose 9Panel Dimmer
Open9.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 NOTE: Ensure that the Park Lamps operate properly before proceeding
with this test.
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the Park Lamps on.
Using a 12-volt test light connected to ground, check the Headlamp Output circuit.
Does the test light illuminate brightly?
All
Yes → Go To 3
No → Repair the Headlamp Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Inspect the Illumination Bulb in question.
Is the Illumination Bulb filament open?
All
Yes → Replace the Illumination Bulb in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
165
INSTRUMENT CLUSTER
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