Symptom:
*COURTESY LAMPS INOPERATIVE - ALL LAMPS
POSSIBLE CAUSES
FUSED B+ CIRCUIT OPEN
INSTRUMENT CLUSTER - COURTESY LAMP OPEN
COURTESY LAMP DRIVER CIRCUIT OPEN
INTERMITTENT CONDITION
TEST ACTION APPLICABILITY
1 Remove the dome lamp lens.
Remove and ensure the bulb is good.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Does the test light illuminate brightly?
All
Yes → Go To 2
No → Repair the open Fused B+ Circuit.
Perform BODY VERIFICATION TEST - VER 1.
2 Disconnect the Instrument Cluster.
Connect a jumper wire between the Courtesy Lamp Driver Circuit and ground.
Observe the Dome Lamp.
Does the test light illuminate brightly?
All
Yes → Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Remove the dome lamp bulb.
Disconnect the Instrument Cluster.
Connect a jumper wire between the Courtesy Lamp Driver Circuit in the Instrument
Cluster connector and ground.
Measure the resistance of the Courtesy Lamp Driver Circuit from the Dome Lamp to
the Instrument Cluster connector.
Is the resistance below 5.0 ohms?
All
Yes → The condition that caused this 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.
No → Repair the open Courtesy Lamp Driver Circuit.
Perform BODY VERIFICATION TEST - VER 1.
175
INTERIOR LIGHTING
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