GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Open the instrument panel compartment.

Does the instrument panel compartment lamp illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Do the courtesy lamps operate properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

  1. Disconnect the instrument panel compartment lamp switch.
  2. Probe the courtesy lamps supply voltage circuit of the instrument panel compartment lamp with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

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

Does the test lamp illuminate?

Go to Step 6

Go to Step 8

6

Inspect for poor connections at the harness connector of the instrument panel compartment lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

7

Repair an open or high resistance in the courtesy lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 10

--

8

Repair an open or high resistance in the ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 10

--

9

Replace the instrument panel compartment lamp switch.

Did you complete the replacement?

Go to Step 10

--

10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3