Schematic Reference: Interior Lights Schematics

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Ensure the front dome lamp switch is in the OFF position.
2. Close all of the vehicle doors.
3. Place the front dome lamp switch in the DOOR position.
4. Wait 30 seconds.

Do the courtesy lamps operate as expected?

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

Go to Step 3

Place the front dome lamp switch in the OFF position.

Do the courtesy lamps remain on with the front dome lamp switch in the OFF position?

Go to Step 7

Go to Step 4

1. Ensure the front dome lamp switch is in the DOOR position.
2. Close all of the vehicle doors.
3. Use the scan tool in order to command the interior lamps OFF.

Do the courtesy lamps turn OFF when commanded?

Go to Step 5

Go to Step 8

1. Close all of the vehicle doors.
2. With a scan tool, observe the Driver Door Switch, Passenger Door Switch, and the Liftgate Ajar Switch parameters in the data list.

Does the scan tool display that all parameters are High?

Go to Step 14

Go to Step 6

Does the scan tool display that the Passenger Door Switch parameter is Low?

Go to Step 10

Go to Step 9

Disconnect the front dome lamp switch.

Is the rear courtesy lamp illuminated?

Go to Step 15

Go to Step 13

Test the courtesy lamps switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

Go to Step 14

While monitoring the parameters, disconnect the connector of the switch that indicates a Low parameter.

Does the scan tool display a parameter change to High when a switch is disconnected?

Go to Step 17

Go to Step 11

While monitoring the parameter, disconnect each passenger door jamb switch one at a time.

Does the scan tool display a parameter change to High when one of the passenger door jamb switches is disconnected?

Go to Step 17

Go to Step 12

Test the ajar switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

Go to Step 14

Test the passenger door ajar switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

Go to Step 14

Inspect for poor connections at the harness connector of the front dome lamp switch. 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 19

Go to Step 16

Inspect for poor connections at the harness connector of the body control module (BCM). 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 19

Go to Step 18

Repair the interior lamp control circuit of the rear dome lamp for a short to ground. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 19

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Replace the front dome lamp switch. Refer to Dome Lamp Replacement .

Did you complete the replacement?

Go to Step 19

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Replace the inoperative ajar switch. Refer to Front Side Door Latch Replacement , Rear Side Door Latch Replacement in Doors, or Liftgate Lock Plate and Rod Replacement in Body Rear End.

Did you complete the replacement?

Go to Step 19

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Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 19

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2