GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Remove the IP compartment lamp bulb.
  3. Probe the courtesy lamps supply voltage circuit with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 3

Go to Step 5

3

Connect a test lamp between the courtesy lamps supply voltage circuit of the IP compartment lamp and the ground circuit of the IP compartment lamp.

Does the test lamp illuminate?

Go to Step 8

Go to Step 4

4

  1. Disconnect the IP compartment lamp switch.
  2. Connect a test lamp between the ground circuit of the IP compartment lamp switch connector and battery voltage.

Does the test lamp illuminate?

Go to Step 9

Go to Step 7

5

  1. Disconnect the IP compartment lamp switch.
  2. Connect a test lamp between the courtesy lamps supply voltage circuit of the IP compartment lamp switch connector and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 6

6

Repair the open in the courtesy lamps supply voltage circuit of the IP compartment lamp. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

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7

Repair the open in the ground circuit of the IP compartment lamp. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

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8

Replace the IP compartment lamp bulb. Refer to IP Compartment Lamp Switch Replacement .

Did you complete the replacement?

Go to Step 10

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9

Replace the IP compartment lamp switch. Refer to IP Compartment Lamp Switch Replacement .

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 2