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 Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Cover the ambient light sensor.
  2. Turn ON the courtesy lamps.
  3. Open the I/P compartment.
  4. Observe the I/P compartment lamp.

Does the I/P 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. Open the I/P compartment door.
  2. Remove the I/P compartment bulb.
  3. Connect a test lamp between the courtesy lamp supply voltage circuit of the I/P compartment lamp bulb and the switched I/P compartment lamp switch ground circuit.

Does the test lamp illuminate?

Go to Step 8

Go to Step 5

5

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

Did you find and correct the condition?

Go to Step 13

Go to Step 6

6

  1. Reinstall the I/P compartment bulb
  2. Disconnect the I/P compartment lamp switch.
  3. Connect a 3-amp fused jumper between the I/P compartment lamp switch circuit of the I/P compartment lamp switch and the ground circuit of the I/P compartment lamp switch.

Does the I/P compartment lamp illuminate?

Go to Step 9

Go to Step 7

7

Test the I/P compartment lamp switch circuit of the I/P compartment switch for high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 10

8

Inspect for poor connections at the connector of the I/P compartment lamp 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 13

Go to Step 11

9

Inspect for poor connections at the harness connector of the I/P compartment lamp 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 13

Go to Step 12

10

Repair the high resistance or open in the I/P compartment lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 13

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11

Replace the I/P compartment lamp bulb. Refer to Instrument Panel Compartment Lamp Replacement .

Did you complete the replacement?

Go to Step 13

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12

Replace the I/P compartment lamp switch. Refer to Instrument Panel Compartment Door Latch Replacement in Instrument Panel, Gages and Console.

Did you complete the replacement?

Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2