Schematic Reference: Fog Lights Schematics

Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. With the engine OFF, turn ON the ignition switch.
2. Turn ON the park lamps.
3. Turn ON the fog lamps.

Do both fog lamps turn ON?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Did only one lamp turn ON?

Go to Step 12

Go to Step 4

1. Remove the fog lamp relay.
2. Install a fused jumper across the switched terminals of the fog lamps relay between the battery positive voltage supply circuit and the fog lamp supply voltage circuit.

Do the fog lamps turn ON?

Go to Step 5

Go to Step 8

1. Disconnect the fog lamp switch.
2. Reinstall the fog lamp relay.
3. Install a jumper between the park lamp supply voltage circuit and the fog lamp relay coil supply circuit.

Do the fog lamps turn ON?

Go to Step 10

Go to Step 6

Test the fog lamp relay coil supply circuit for a poor connection, an open, or a short to ground. Refer to Connector Repairs and Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 7

Test for a poor connection or an open in the park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

Go to Step 10

Test for a short to ground in the fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

Go to Step 9

Inspect for a poor connection at the harness connector of the underhood accessory wiring junction block. 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 16

Go to Step 13

Inspect for a poor connection 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 16

Go to Step 14

Inspect for a poor connection 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 16

Go to Step 15

Repair the open or the high resistance in the inoperative fog lamp supply voltage or the fog lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Replace the fog lamp switch. Refer to Fog Lamp Switch Replacement .

Did you complete the repair?

Go to Step 16

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Replace the fog lamp relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2