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 ON the ignition, with the engine OFF.
  2. Place the gear selector in park or neutral.

Do the backup lamps illuminate?

Go to Step 3

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

3

Disconnect the backup lamp switch, for manual transaxle or the park neutral position switch, for automatic transaxle.

Are the backup lamps illuminated?

Go to Step 4

Go to Step 5

4

Repair the short to battery positive voltage in the backup lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 6

--

5

Replace the appropriate switch. Refer to Backup Lamp Switch Replacement in Manual Transmission or Park/Neutral Position Switch Replacement in Automatic Transaxle.

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 3