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Courtesy Lamps Inoperative

Courtesy Lamps Inoperative

Step Action Yes No
Schematic Reference: Interior Lights Schematics 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
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 
3 Is only one courtesy lamp inoperative? Go to Step 4  Go to Step 5 
4 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 
5 Are all courtesy lamps inoperative at all times? Go to Step 6  Go to Step 7 
6 Test the courtesy lamp supply voltage and battery positive voltage circuits of the BCM for the following:
  • An open
  • A high resistance
  • A short to ground

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 
7 Are the courtesy lamps inoperative from the front dome lamp switch only? Go to Step 8  Go to Step 9 
8 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 
9 Are the courtesy lamps inoperative from all doors and the liftgate? Go to Step 10  Go to Step 12 
10
  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 
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 
12
  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 
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 
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 
15 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 
16 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 
17 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 
18 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 
19 Replace the bulb. Refer to Dome Lamp Bulb Replacement .
Did you complete the replacement?		 Go to Step 23  -
20 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  -
21 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  -
22 Replace the inoperative switch. Refer to the following:
Did you complete the replacement?		 Go to Step 23  -
23 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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