For 1990-2009 cars

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 park neutral position switch. 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 park neutral position switch. Refer to 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