GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Place the gear selector in the PARK position.

Do the backup lamps remain illuminated?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

  1. Turn OFF the ignition.
  2. Remove the REVERSE relay.
  3. Turn ON the ignition, with the engine OFF.

Do the Backup Lamps remain illuminated?

Go to Step 4

Go to Step 5

4

Repair the short to voltage in the supply voltage circuit of the Backup Lamps. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 6

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5

Replace the REVERSE relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2