GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Component Connector End Views

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 Replacement for the MVA auto transmission, Park/Neutral Position Switch Replacement for the MVB auto transmission, Park/Neutral Position Switch Replacement for the MVD auto transmission or Backup Lamp Switch Replacement for the MVC manual transmission or Backup Lamp Switch Replacement for the MVE manual transmission.

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