For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Exterior Lights Schematics
1 | Did you review the exterior lighting description and operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Lighting Systems
2 |

1. Probe the upfitter connector park lamp supply voltage circuit with a test lamp that is connected to a good ground.
2. Place the headlamp switch in the PARK position.

Does the test lamp illuminate?

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

Go to Step 3

3 | Are the vehicle's park lamps illuminated? | Go to Step 4 | Go to Park Lamps Inoperative
4 | Repair an open, high resistance, or short to ground in the upfitter connector park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 5 | --
5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3