Step  | Action  | Value(s)  | Yes  | No  | 
|---|---|---|---|---|
1  | Did you perform the Lighting Systems Diagnostic System Check?  | --  | Go to Step 2  | |
2  | 
 Does the fog lamps switch operate properly?  | --  | Go to Step 3  | Go to Step 7  | 
3  | Remove the fog lamp relay from the underhood relay center. Do the fog lamps turn off?  | --  | Go to Step 4  | Go to Step 10  | 
4  | 
 Are the fog lamps on?  | --  | Go to Step 5  | Go to Step 6  | 
5  | Inspect CKT 1317 (DK GRN/WHT) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 1317 OK?  | --  | Go to Step 12  | Go to Step 13  | 
6  | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control Systems. Is the body control module replacement complete?  | --  | Go to Step 14  | --  | 
7  | Disconnect the headlamp switch connector C1. Do the fog lamps turn off?  | --  | Go to Step 8  | Go to Step 9  | 
8  | Replace the headlamp switch. Refer to Headlamp Switch Replacement in Lighting Systems. Is the headlamp switch replacement complete?  | --  | Go to Step 14  | --  | 
9  | Inspect CKT 192 (ORN) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 192 OK?  | --  | Go to Step 11  | Go to Step 13  | 
10  | Repair the short to voltage in CKT 34 (PPL). Refer to Wiring Repairs in Wiring Systems. Is the repair complete?  | --  | Go to Step 14  | --  | 
11  | Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the IPC replacement complete?  | --  | Go to Step 14  | --  | 
12  | Replace the fog lamp relay. Is the repair complete?  | --  | Go to Step 14  | --  | 
13  | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?  | --  | Go to Step 14  | --  | 
14  | Operate the system in order to verify the repair. Did you correct the condition?  | --  | System OK.  | Go to Step 2  |