Schematic Reference: Fog Lights Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the low beam headlamps.
3. Turn ON the front fog lamps.
4. Observe the rear fog lamps.
5. Turn ON and OFF the rear fog lamps.
6. Turn OFF the ignition .

Did the rear fog lamps operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Position the rear fog lamp switch to the OFF position.
4. With a scan tool, observe the Rear Fog Lamp Switch parameter in the dash integration module (DIM) Inputs data list.

Does the scan tool indicate that the rear fog lamp switch is parameter Idle?

Go to Step 4

Go to Step 7

With a scan tool, observe the Rear Fog Lamp Relay status in the DIM Outputs data list.

Does the scan tool indicate the rear fog lamp relay is parameter Off?

Go to Step 5

Go to Step 11

1. Turn OFF the ignition .
2. Disconnect the rear fog lamp relay. Refer to Relay Replacement .
3. Turn ON the ignition, with the engine OFF.

Did the rear fog lamps turn OFF?

Go to Step 6

Go to Step 14

1. Turn OFF the ignition .
2. Connect a test lamp between the rear fog lamp relay control side supply voltage circuit and the fog lamp relay control circuit.
3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 8

Go to Step 13

1. Turn OFF the ignition.
2. Disconnect the multifunction, turn signal switch.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool observe the Rear Fog Lamp Switch parameter.

Does the scan tool indicate the Rear Fog Lamp Switch parameter is Idle?

Go to Step 10

Go to Step 9

Test for a short to ground in the fog lamp relay control circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 11

Test the rear fog lamp switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 11

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

Did you find and correct the condition?

Go to Step 18

Go to Step 12

Inspect for poor connections at the harness connector of the DIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 15

Inspect for poor connections at the harness connector of the multifunction, turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 16

Inspect for poor connections at the rear fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 17

Repair the short to power in the rear fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did to complete the repair?

Go to Step 18

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

Did you complete the replacement?

Go to Step 18

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Replace the multifunction, turn signal switch. Refer to Turn Signal Multifunction Switch Replacement .

Did you complete the replacement?

Go to Step 18

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

Did you complete the replacement?

Go to Step 18

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2