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. Turn ON the ignition, with the engine OFF.
  2. Turn ON the backup lamps.
  3. Disconnect the inoperative backup lamp bulb.
  4. Connect a test light between the backup lamp feed circuit and a good ground.

Does the test light illuminate?

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Go to Step 3

Go to Step 6

3

Connect a test light between the backup lamp feed circuit and the backup lamp ground circuit.

Does the test light illuminate?

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Go to Step 4

Go to Step 7

4

Inspect for poor connections at the backup 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 suspect backup lamp. Refer to Backup Lamp Bulb Replacement .

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 backup lamp power feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 8

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7

Repair the open in the reverse lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 7

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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