Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Fog Lights Schematics | |||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |
2 |
Are the fog lamps operating properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Determine if one fog lamp is inoperative or both fog lamps are inoperative. Is one fog lamp inoperative? | Go to Step 14 | Go to Step 4 |
4 | Verify that the fog lamp indicator illuminates when the fog lamp switch is turned on. Is the fog lamp indicator on? | Go to Step 10 | Go to Step 5 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 12 |
6 | Probe the park lamp supply voltage circuit (RF75) of the multifunction relay connector with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 15 |
7 | Probe the ignition voltage circuit (X820) of the multifunction relay connector with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 16 |
8 |
Does the test lamp illuminate? | Go to Step 11 | Go to Step 9 |
9 |
Does the test lamp illuminate? | Go to Step 13 | Go to Step 17 |
10 |
Does the test lamp illuminate? | Go to Step 18 | Go to Step 19 |
11 | Test the fog lamp supply voltage circuit (FP50) for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 20 |
12 | Test the switched battery supply voltage circuit (FA888) for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 21 |
13 | Test the fog lamp switch signal circuit (F28) for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 22 |
14 | Test the supply voltage circuit or the ground circuit of the inoperative lamp for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
15 | Repair an open or high resistance in the park lamp supply voltage circuit (RF75). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
16 | Repair an open or high resistance in the ignition voltage circuit (X820) . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
17 | Repair an open or high resistance in the headlamp switch ground circuit (F18) . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
18 | Repair an open or high resistance in the fog lamps ground circuit (F1, F400) . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
19 | Repair an open or high resistance in the fog lamp supply voltage circuit (FP36,FP27,X1) . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
20 | Replace the multifunction relay K134. Did you complete the repair? | Go to Step 24 | -- |
21 | Replace the RH beam headlamp relay K132 Did you complete the repair? | Go to Step 24 | -- |
22 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 24 | -- |
23 | Replace the inoperative lamp. Refer to Front Fog Lamp Bulb Replacement . Did you complete the repair? | Go to Step 24 | -- |
24 |
Do the fog lamps operate properly? | System OK | Go to Step 2 |
