GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

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

3

Disconnect the backup lamp switch, for a manual transaxle or the park/neutral position switch, for an 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 .

Did you complete the repair?

Go to Step 6

--

5

Replace the appropriate switch. Refer to Backup Lamp Switch Replacement for the manual transmission or Park/Neutral Position Switch Replacement for the automatic transmission.

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