Fog Lamps Always On Front
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Fog Lights Schematics | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 |
Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
3 | Turn the headlamps ON then OFF. Do the exterior lamps operate properly? | Go to Step 4 | Go to Park Lamps Inoperative |
4 | Are the fog lamps on with the parking lamps off? | Go to Step 5 | Go to Step 6 |
5 | Remove the FOG LP relay. Are the fog lamps illuminated? | Go to Step 13 | Go to Step 9 |
6 |
Are the fog lamps illuminated? | Go to Step 12 | Go to Step 7 |
7 | Connect a test lamp between the front fog lamp switch signal circuit of the BCM and a battery positive voltage circuit. Does the test lamp illuminate? | Go to Step 8 | Go to Step 11 |
8 | Test the front fog lamp switch signal circuit of the front fog lamp relay for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 14 |
10 | Inspect for poor connections at the harness connector of the fog lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 15 |
11 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
12 | Repair the short to ground in the fog lamp relay control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
13 | Repair the short to voltage in the front fog lamps supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
14 | Replace the FOG LP relay. Did you complete the replacement? | Go to Step 17 | -- |
15 | Replace the fog lamp switch. Refer to Fog Lamp and Cargo Lamp Switch Assembly Replacement . Did you complete the replacement? | Go to Step 17 | -- |
16 |
Important: Perform the setup procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 17 | -- |
17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Fog Lamps Always On Export, Rear
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Fog Lights Schematics | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 | Turn OFF and then ON the rear fog lamps. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
3 | Disconnect the body control module (BCM) connector. Are the rear fog lamps illuminated? | Go to Step 4 | Go to Step 6 |
4 | Remove the RR FOG LP relay. Are the rear fog lamps illuminated? | Go to Step 11 | Go to Step 5 |
5 | Test the rear fog lamps relay control circuit of the rear fog lamp relay for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | |
6 | Connect a test lamp between the rear fog lamp switch signal circuit of the BCM and a battery positive voltage circuit. Does the test lamp illuminate? | Go to Step 7 | Go to Step 10 |
7 | Test the rear fog lamp switch signal circuit of the rear fog lamp switch for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the rear fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
9 | Inspect for poor connections at the harness connector of the rear fog lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
10 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
11 | Repair the short to voltage in the rear fog lamps supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | -- |
12 | Replace the RR FOG LP relay. Did you complete the replacement? | Go to Step 15 | -- |
13 | Replace the rear fog lamp switch. Refer to Rear Fog Lamp Switch Replacement . Did you complete the replacement? | Go to Step 15 | -- |
14 |
Important: Perform the setup procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
