GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Remove the bulb from the inoperative reading lamp.
  2. Connect a test lamp between the power feed circuit of the inoperative reading lamp bulb and a good ground.
  3. Turn ON the reading lamp switch.

Does the test lamp light?

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Go to Step 3

Go to Step 6

3

Connect the test lamp between the inoperative reading lamp power feed circuit and the reading lamp ground circuit.

Does the test lamp illuminate?

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Go to Step 4

Go to Step 7

4

Inspect for poor connections at the reading lamp connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 8

Go to Step 5

5

Replace the appropriate reading lamp switch assembly. Refer to Compartment and UGDO Replacement - Overhead in Interior Trim.

Did you complete the replacement?

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Go to Step 8

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6

Repair the open or high resistance in the appropriate reading lamp power feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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7

Repair the open or high resistance in the ground circuit of the inoperative reading lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 2