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

Important: If the liftgate is opened after all the modules go to sleep, the dome light will not come on. The liftgate ajar switch input to the body control module (BCM) will not wake up the BCM once it has gone to sleep, so the dome light will not come on. Once the BCM gets an input to wake it up from remote keyless entry (RKE) or a door handle, the dome light will turn on when the liftgate is opened.

1. Place the front dome lamp switch in the AUTO position.
2. Observe the courtesy lamps.
3. Open and close all of the vehicle doors.
4. Place the courtesy lamp switch in the ON position.

Do the courtesy lamps illuminate as expected?

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

Go to Step 3

Is only one courtesy lamp inoperative?

Go to Step 4

Go to Step 5

Test the voltage supply and ground circuits of the inoperative courtesy lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 19

Are all courtesy lamps inoperative at all times?

Go to Step 6

Go to Step 7

Test the courtesy lamp supply voltage and battery positive voltage circuits of the BCM for the following:

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 17

Are the courtesy lamps inoperative from the front dome lamp switch only?

Go to Step 8

Go to Step 9

Test the ground circuit of the front dome lamp switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 16

Are the courtesy lamps inoperative from all doors and the liftgate?

Go to Step 10

Go to Step 12

1. Open the doors.
2. Connect a test lamp between the courtesy lamp switch signal circuit of the front dome lamp connector and battery positive voltage.

Does the test lamp illuminate?

Go to Step 16

Go to Step 11

Test the courtesy lamp switch circuit of the BCM for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 17

1. With the scan tool, observe the parameter of the door that does not illuminate the courtesy lamps using the following:

•	DRIVER DOOR SWITCH

•	PASS DOOR SWITCH

•	LIFTGATE AJAR SWITCH

2. Open and close the door.

Does the parameter switch from HIGH to LOW as expected?

Go to Step 17

Go to Step 13

1. Close all doors that illuminate the courtesy lamps.
2. Disconnect the inoperative door ajar switch connector.
3. Connect a 3-amp fused jumper wire between the signal circuit of the connector and a good ground.

Do the courtesy lamps illuminate?

Go to Step 15

Go to Step 14

Test the signal circuit of the switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 17

Test the ground circuit of the switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 23

Go to Step 18

Inspect for poor connections at the harness connector of the front courtesy lamp assembly. 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 23

Go to Step 20

Inspect for poor connections at the harness connector of the 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 23

Go to Step 21

Inspect for poor connections at the harness connector of the inoperative 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 23

Go to Step 22

Replace the bulb. Refer to Dome Lamp Bulb Replacement .

Did you complete the replacement?

Go to Step 23

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Replace the bulb or lamp assembly. Refer to Dome Lamp Bulb Replacement or Dome Lamp Replacement .

Did you complete the replacement?

Go to Step 23

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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 23

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Replace the inoperative switch. Refer to the following:

Did you complete the replacement?

Go to Step 23

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3