Step  | Action  | Yes  | No  | 
|---|---|---|---|
Schematic Reference: Headlights Schematics  | |||
1  | Did you perform the Lighting Diagnostic System Check?  | Go to Step 2  | |
2  | Verify the fault is present. Does the system operate normally?  | Go to Testing for Electrical Intermittents in Wiring Systems  | Go to Step 3  | 
3  | 
 Are both the high and the low beam off?  | Go to Step 4  | Go to Step 6  | 
4  | Connect a test lamp from between the headlamp dimmer switch output-low circuit and a good ground, then between the headlamp dimmer switch output-high circuit and to a good ground at connector C201C. Does the test lamp illuminate at both terminals?  | Go to Step 7  | Go to Step 5  | 
5  | Repair the open in the headlamp dimmer switch output-low circuit or the headlamp dimmer switch output-high circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?  | Go to Step 8  | --  | 
6  | Repair the short to ground in the headlamp dimmer switch output-low circuit or in the headlamp dimmer switch output-high circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?  | Go to Step 8  | --  | 
7  | Replace the headlamp dimmer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt. Did you complete the repair?  | 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  |