Schematic Reference: Fog Lights Schematics

Connector End View Reference: Master Electrical Component List

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the ignition to the RUN position.
2. Turn ON the park lamps.
3. Turn ON the fog lamps.

Does the fog lamp indicator illuminate?

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

Go to Step 3

1. Turn the ignition to the ON position.
2. Remove the fog lamp switch, do not disconnect.
3. Turn the headlamp switch ON.
4. Press the fog lamp switch.
5. Using a test lamp connected to ground, back probe the fog lamp relay switched battery positive voltage supply circuit at the fog lamp switch.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

Test for a poor connection or an open in the fog lamp relay switched battery positive voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct condition?

Go to Step 10

Go to Step 8

1. Disconnect the BCM connector C3.
2. At the BCM connector C3, install a jumper between the fog lamp indicator control circuit and ground.
3. Turn the ignition to the ON position.
4. Press the fog lamp switch.

Does the fog lamp switch indicator illuminate?

Go to Step 9

Go to Step 6

Test for a short to battery positive voltage, an open or a high resistance in the fog lamp indicator control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 7

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

Did you complete the repair?

Go to Step 10

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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 9

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Important: Perform the set up procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Bodyb Control Systems. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3