GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

1

Did you review the courtesy lamp operation and perform the necessary inspections?

Go to Step 2

Go to Interior Lighting Systems Description and Operation

2

  1. Open the instrument panel (IP) compartment.
  2. Depress the IP compartment lamp switch.

Does the system operate normally?

Go to Testing for Electrical Intermittents in Wiring Systems

Go to Step 3

3

Do any courtesy lights function properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

Remove and inspect the bulb.

Is the bulb open?

Go to Step 7

Go to Step 5

5

Test the courtesy lamp battery positive voltage circuit of the IP compartment lamp for 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 11

Go to Step 6

6

Test the courtesy lamp ground circuit of the IP compartment lamp for 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 11

Go to Step 8

7

Inspect for poor connections at the harness connector of the IP compartment bulb. 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 11

Go to Step 9

8

Inspect for poor connections at the harness connector of the IP compartment 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 11

Go to Step 10

9

Replace the bulb. Refer to Instrument Cluster Bulb Replacement .

Did you complete the repair?

Go to Step 11

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10

Replace the IP compartment lamp assembly. Refer to Instrument Cluster Bulb Replacement .

Did you complete the repair?

Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3