Cargo Door Ajar Indicator Inoperative

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Body Rear End Schematics
1	Did you perform the Body Rear End Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Body Rear End
2	Open the lift glass or cargo doors. Did the cargo door ajar indicator illuminate?	Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS	Go to Step 3
3	Connect a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, command the cargo door ajar indicator ON and OFF. Does the message turn on and off with each command?	Go to Step 4	Go to Step 12
4	Open the cargo door or lift glass. With a scan tool, observe the cargo door or lift glass ajar switch parameter in the BCM data list. Does the scan tool display the switch as active?	Go to Step 9	Go to Step 5
5	Gain access to and disconnect the cargo door or lift glass ajar switch. Connect a 3 amp jumper wire between the signal circuit of the switch and the ground circuit of the switch. With a scan tool, observe the cargo door or lift glass ajar switch parameter in the BCM data list. Does the scan tool display the switch as active?	Go to Step 8	Go to Step 6
6	Test the cargo door or lift glass ajar switch signal circuit for an open, high resistance and a short to voltage. Refer to CIRCUIT TESTING , TESTING FOR CONTINUITY and TESTING FOR A SHORT TO VOLTAGE . Did you find and correct the condition?	Go to Step 13	Go to Step 7
7	Test the cargo door or lift glass ajar switch ground circuit for an open and high resistance. Refer to CIRCUIT TESTING and TESTING FOR CONTINUITY . Did you find and correct the condition?	Go to Step 13	Go to Step 8
8	Inspect for poor connections at the cargo door or lift glass ajar switch(s). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	Go to Step 13	Go to Step 10
9	Inspect for poor connections at the harness connector of the body control module (BCM). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	Go to Step 13	Go to Step 11
10	Replace the door ajar switch. Refer to Latch Replacement - Liftgate or Latch Replacement - Door (Cargo Door Lower) or Latch Replacement - Door (Cargo Door Upper) . Did you complete the replacement?	Go to Step 13	-
11	IMPORTANT: When replacing the BCM refer to BODY CONTROL MODULE (BCM) PROGRAMMING/RPO CONFIGURATION . Replace the body control module (BCM). Refer to BODY CONTROL MODULE REPLACEMENT . Did you complete the replacement?	Go to Step 13	-
12	Replace the instrument panel cluster. Refer to INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT . Did you complete the replacement?	Go to Step 13	-
13	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3