GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the ignition ON.
  2. Shift the gear selector lever to the DRIVE position.

Do the backup lamps turn ON?

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

Go to Step 3

3

Remove the backup lamps relay.

Do the backup lamps turn OFF?

Go to Step 5

Go to Step 4

4

Repair a short to battery positive voltage in the backup lamps supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 6

--

5

Replace the backup lamp relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2