GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

1

Did you review the Body Rear End description and operation and perform the necessary inspections?

Go to Step 2

Go to Luggage Compartment Description and Operation

2

Close the rear compartment.

Does the trunk ajar indicator illuminate?

Go to Step 3

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

3

Disconnect the rear compartment courtesy lamp.

Does the trunk ajar indicator illuminate?

Go to Step 5

Go to Step 4

4

  1. Connect the rear compartment courtesy lamp.
  2. Disconnect the rear compartment courtesy lamp switch.

Does the trunk ajar indicator illuminate?

Go to Step 7

Go to Step 6

5

Test the signal circuit of the courtesy lamp 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 10

Go to Step 9

6

Inspect for poor connections at the harness connector of the rear compartment courtesy lamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

7

Repair the short to ground in the signal circuit of the rear compartment courtesy lamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

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8

Replace the rear compartment courtesy lamp switch.

Did you complete the replacement?

Go to Step 10

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9

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3