Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Fog Lights Schematics | |||
1 | Did you review the fog lamp operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is only the rear fog lamp indicator inoperative? | Go to Step 4 | Go to Step 5 |
4 | Test the headlamp switch signal circuit of the rear fog lamp switch for high resistance or an open. Did you find and correct the condition? | Go to Step 20 | Go to Step 15 |
5 | Is the rear fog lamp switch illumination operative? | Go to Step 7 | Go to Step 6 |
6 | Test the ground circuit of the rear fog lamp switch for high resistance or an open. Did you find and correct the condition? | Go to Step 20 | Go to Step 7 |
7 |
Does the rear fog lamp illuminate? | Go to Step 10 | Go to Step 8 |
8 | Test the battery positive voltage circuit of the rear fog lamp relay for high resistance or an open. Did you find and correct the condition? | Go to Step 20 | Go to Step 9 |
9 | Test the rear fog lamp supply circuits between the rear fog lamp relay and ground for a high resistance or an open. Did you find and correct the condition? | Go to Step 20 | Go to Step 13 |
10 | Connect a test lamp between the headlamp switch signal circuit of the rear fog lamp relay and a good ground. Does the test lamp illuminate? | Go to Step 11 | Go to Step 16 |
11 | Connect a test lamp between the rear fog lamp relay control circuit of the rear fog lamp relay and a battery positive voltage circuit. Does the test lamp illuminate? | Go to Step 14 | Go to Step 12 |
12 | Test the rear fog lamp relay control circuit of the rear fog lamp relay for a high resistance or an open. Did you find and correct the condition? | Go to Step 20 | Go to Step 15 |
13 | Inspect for poor connections at the harness connector of the rear fog lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
14 | Inspect for poor connections at the harness connector of the rear fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
15 | Inspect for poor connections at the harness connector of the rear fog lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
16 | Repair the headlamp switch signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Replace the rear fog lamp bulb. Refer to Rear Fog Lamp Bulb Replacement Did you complete the replacement? | Go to Step 20 | -- |
18 | Replace the rear fog lamp relay. Did you complete the replacement? | Go to Step 20 | -- |
19 | Replace the rear fog lamp bulb. Refer to Rear Fog Lamp Switch Replacement Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||
1 | Did you review the fog lamps operation and perform the necessary inspections? | ||
2 |
Does the fog lamp system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | |
3 | Do the low beam headlamps operate correctly? | ||
4 | Is only one lamp inoperative? | ||
5 | Is the fog lamp ON indicator inoperative while the fog lamps are illuminated? | ||
6 | Is the fog lamp ON indicator illuminated while the fog lamps are inoperative. | ||
7 | Test the front fog lamps supply voltage circuit of the inoperative lamp for high resistance or an open. Did you find and correct the condition? | ||
8 | Test the ground circuit of the inoperative lamp for high resistance or an open. Did you find and correct the condition? | ||
9 | Test the ground circuit of the fog lamp switch for a high resistance, or an open. Did you find and correct the condition? | ||
10 | Test the front fog lamp switch signal circuit of the fog lamp switch for high resistance or an open. Did you find and correct the condition? | ||
11 |
Do the fog lamps illuminate? | ||
12 | Test the battery positive voltage circuit of the fog lamp relay for high resistance, an open, or a short to ground. Did you find and correct the condition? | ||
13 | Test the front fog lamp switch signal circuit of the fog lamp relay for high resistance, or an open. Did you find and correct the condition? | ||
14 | Test the ground circuit of the fog lamp relay for high resistance, or an open. Did you find and correct the condition? | ||
15 |
Do the fog lamps illuminate? | ||
16 |
Do the fog lamps illuminate? | ||
17 |
Does the test lamp illuminate? | ||
18 |
Does the test lamp illuminate? | ||
19 | Test the DRL control relay circuit for a short to ground. Did you find and correct the condition? | ||
20 | Test the headlamp low beam supply voltage circuit for a high resistance, or and open. Did you find and correct the condition? | ||
21 | Test the front fog lamp supply voltage circuit of the enable relay for high resistance, an open, or a short to ground. Did you find and correct the condition? | ||
22 | Connect test lamp between the ignition 1 voltage circuit of the enable relay and ground. Does the test lamp illuminate? | ||
23 | Inspect for poor connections at the harness connector of the inoperative lamp and bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | ||
24 | 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? | ||
25 | 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? | ||
26 | Inspect for poor connections at the harness connector of the fog lamp enable relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | ||
27 | Inspect for poor connections at the harness connector of the DRL control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | ||
28 | Repair the front fog lamps supply voltage circuit. Did you complete the repair? | -- | |
29 | Repair the front fog lamp switch signal circuit between S261 and the fog lamp switch. Did you complete the repair? | -- | |
30 | Repair the ignition 1 voltage circuit between S261 and the DRL control module. Did you complete the repair? | -- | |
31 | Replace the inoperative lamp or bulb. Refer to Front Fog Lamp Replacement or Front Fog Lamp Bulb Replacement . Did you complete the replacement? | -- | |
32 | Replace the fog lamp relay. Refer to Fog Lamp Relay Replacement . Did you complete the replacement? | -- | |
33 | Replace the fog lamp switch. Refer to Fog Lamp Switch Replacement . Did you complete the replacement? | -- | |
34 | Replace the fog lamp enable relay. Did you complete the replacement? | -- | |
35 | Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Did you complete the replacement? | -- | |
36 | Operate the system in order to verify the repair. Did you correct the condition? | System OK |