Step  | Action  | Yes  | No  | 
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views  | |||
1  | Did you perform the Diagnostic System Check - Vehicle?  | Go to Step 2  | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information  | 
2  | Verify that the marker, license and tail lamps are always on. Do the marker, license and tail lamps operate normally?  | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems  | Go to Step 3  | 
3  | Disconnect the headlamp switch. Do the marker, license, and tail lamps remain illuminated?  | Go to Step 4  | Go to Step 6  | 
4  | Test for a short to voltage in the park lamps supply voltage or a short to ground in the park lamp relay control circuit. Refer to Circuit Testing in Wiring Systems. Was a problem found?  | Go to Step 5  | Go to Step 7  | 
5  | Repair the short to voltage in the park lamps supply voltage or a short to ground in the park lamp relay control circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?  | Go to Step 8  | --  | 
6  | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Is the repair complete?  | Go to Step 8  | --  | 
7  | Replace the park lamp relay. Is the repair complete?  | Go to Step 8  | --  | 
8  | Operate the system in order to verify the repair. Did you correct the condition?  | System OK  | Go to Step 3  |