Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Important:: The sun load sensor assembly must indicate low light conditions for the courtesy lamps to operate.

1. Cover the sun load sensor assembly.
2. Observe the ignition key cylinder lamp.
3. Open the door.
4. Close the door.
5. Wait more than 25 seconds.

Does the ignition key cylinder lamp operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Do the courtesy lamps operate properly?

Go to Step 4

Go to Courtesy Lamps Always On and Courtesy Lamps Inoperative

4

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, command the Key Cylinder Halo Lamp ON and OFF from the instrument panel module (IPM) with CJ2 or the climate control panel (CCP) with C67 miscellaneous Test data list.

Does the ignition key cylinder lamp turn ON and OFF with each command?

Go to Step 9

Go to Step 5

1. Turn OFF the ignition.
2. Disconnect the ignition key cylinder lamp bulb.
3. Connect a test lamp between the battery positive voltage circuit of the ignition key cylinder lamp and the key cylinder lamp control circuit of the ignition key cylinder lamp.
4. Turn ON the ignition, with the engine OFF.
5. With a scan tool, command the Key Cylinder Halo Lamp ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 8

Go to Step 6

Test the battery positive voltage circuit of the ignition key cylinder lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

Test the key cylinder lamp control circuit of the ignition key cylinder lamp for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 9

Inspect for poor connections at the ignition key cylinder lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

Inspect for poor connections at the harness connector of the IPM with CJ2 or the HVAC control module (CCP) with C67. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 11

Replace the ignition key cylinder lamp bulb. Refer to Ignition Lock Cylinder Bulb Replacement .

Did you complete the replacement?

Go to Step 12

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Important: After replacement, perform the setup procedure for the IPM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the IPM with CJ2 or HVAC control module (CCP) with C67. Refer to Instrument Panel Module Replacement in Body Control System or HVAC Control Module Replacement in HVAC Systems - Manual.

Did you complete the replacement?

Go to Step 12

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Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2