Schematic Reference: Fog Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the park lamps.
3. Observe the fog lamps.
4. Turn ON and OFF the fog lamps.
5. Turn the ignition OFF.

Did the fog lamps operate properly?

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

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 input parameter in the instrument panel module (IPM) Non - HVAC data list.

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

Go to Step 4

Go to Step 7

With a scan tool, observe the rear fog lamp relay control status in the rear integration module (RIM) Outputs data list.

Does the scan tool indicate the fog lamp relay is OFF?

Go to Step 5

Go to Step 11

1. Turn the ignition OFF.
2. Disconnect the RR FOG LP relay. Refer to Relay Replacement in Wiring Systems.
3. Turn ON the ignition, with the engine OFF.

Did the fog lamps turn OFF?

Go to Step 6

Go to Step 15

1. Turn the ignition OFF.
2. Connect a test lamp between the RR FOG LP relay control side supply voltage circuit and the rear 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 14

1. Turn OFF the ignition.
2. Disconnect the fog lamp switch.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool observe the rear fog lamp switch input .

Does the scan tool indicate the fog lamp switch is OFF?

Go to Step 10

Go to Step 9

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

Did you find and correct the condition?

Go to Step 20

Go to Step 11

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

Did you find and correct the condition?

Go to Step 20

Go to Step 12

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

Did you find and correct the condition?

Go to Step 20

Go to Step 13

Inspect for poor connections at the harness connector of the RIM. 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 20

Go to Step 16

Inspect for poor connections at the harness connector of the IPM. 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 20

Go to Step 17

Inspect for poor connections 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 20

Go to Step 18

Inspect for poor connections at 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 20

Go to Step 19

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

Did to complete the repair?

Go to Step 20

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Important:: Perform the setup procedure for the RIM after RIM replacement.

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 20

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Important:: Perform the setup procedure for the IPM after IPM replacement.

Replace the IPM. Refer to Instrument Panel Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 20

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Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 20

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Replace the RR FOG LP relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 20

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2