GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2

Verify that the backup lamps are always on.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the Park/Neutral position switch or the Backup lamp switch.

Are the backup lamps still illuminated?

Go to Step 4

Go to Step 5

4

Find and repair the short to voltage in the backup lamp feed circuit. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 6

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5

Replace the Park/Neutral position switch or the Backup lamp switch. Refer to Park/Neutral Position Switch or Backup Lamp Switch Replacement .

Did you complete the repair?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3