Schematic Reference: Fog Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Verify that the rear fog lamps are inoperative.

Does the rear fog lamp operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

With the engine OFF, turn the key to RUN and the headlamp switch to PARK.

Do the park lamps illuminate?

Go to Step 4

Go to Park, License, and Tail Lamps Inoperative

Inspect the SEO 1 fuse.

Is the fuse open?

Go to Step 10

Go to Step 5

1. Place the rear fog lamp switch in the ON position.
2. Remove the rear fog lamp relay.
3. Test for a ground signal at the rear fog lamp relay control circuit of the rear fog lamp relay. Refer to Circuit Testing.

Was a ground signal present?

Go to Step 8

Go to Step 6

Test for an open, high resistance, or short to voltage in the following circuits:

Refer to Circuit Testing and Wiring Repairs.

Did you find and correct a condition?

Go to Step 14

Go to Step 7

1. Remove the rear fog lamp switch.
2. Place a fused jumper between the rear fog lamp switch signal and ground connector terminals.
3. Test for a ground signal at the rear fog lamp relay control circuit of the rear fog lamp relay. Refer to Circuit Testing.

Was a ground signal present?

Go to Step 13

Go to Step 9

Test for an open or high resistance in the rear fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct a condition?

Go to Step 14

Go to Step 12

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 14

Go to Step 11

Repair the fog lamp supply circuit of the inoperative lamp for a short to ground. Refer to Wiring Repairs.

Did you complete the repair?

Go to Step 14

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Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 14

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Replace the rear fog lamp relay. Refer to Relay Replacement.

Did you complete the replacement?

Go to Step 14

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

Did you complete the repair?

Go to Step 14

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3