GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Open the rear compartment.

Does the rear compartment lamp operate properly?

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

Go to Step 3

3

Do the courtesy lamps operate properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

  1. Position the courtesy lamp switch in the ON position.
  2. Remove the bulb from the rear compartment lamp.
  3. Connect a test lamp between the courtesy lamps supply voltage circuit of the rear compartment lamp bulb and the rear compartment lamp control circuit of the rear compartment lamp bulb.

Did the test lamp illuminate?

Go to Step 8

Go to Step 5

5

Test the courtesy lamps supply voltage circuit of the rear compartment lamp bulb for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 6

6

Test the rear compartment lamp control circuit of the rear compartment lamp bulb for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

7

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

Did you find and correct the condition?

Go to Step 12

Go to Step 9

8

Inspect for poor connections at the bulb of the rear compartment lamp. 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 12

Go to Step 10

9

Inspect for poor connections at the harness connector of the rear compartment lid ajar 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 12

Go to Step 11

10

Replace the rear compartment lamp bulb. Refer to Rear Compartment Courtesy Lamp Replacement .

Did you complete the replacement?

Go to Step 12

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11

Replace the rear compartment lid ajar switch. Refer to Rear Compartment Lid Latch Replacement in Body Rear End.

Did you complete the replacement?

Go to Step 12

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12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2