Step  | Action  | Value(s)  | Yes  | No  | 
|---|---|---|---|---|
1  | Did you perform the Exterior Lights System Check?  | --  | Go to Step 2  | |
2  | 
 Does the test lamp light?  | --  | Go to Step 3  | Go to Step 5  | 
3  | 
 Does the test lamp light?  | --  | Go to Step 6  | Go to Step 4  | 
4  | Repair the open in CKT 150 (BLK) between splice S421 and ground G400. Refer to Wiring Repairs in Wiring systems. Is the repair complete?  | --  | --  | |
5  | Repair the open in CKT 17 (WHT) between splice S410 and splice S422. Refer to Wiring Repairs in Wiring systems. Is the repair complete?  | --  | --  | |
6  | Replace the center high-mounted stoplamp. Refer to High Mount Stop Lamp Replacement . Is the repair complete?  | --  | --  |