Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

Did you perform the Lighting Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Verify that the DRL headlamps are on with the parking brake applied.

Do the DRL headlamps operate normally with the parking brake applied?

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

Go to Step 3

1. Set the park brake.
2. Turn the ignition On with the engine OFF.
3. With the scan tool, read the park brake switch status.

Does the scan tool display SET?

Go to Step 7

Go to Step 4

1. Disconnect the park brake switch.
2. Connect a fused jumper wire between the park brake switch signal circuit and a good ground.
3. With the scan tool, read the park brake switch status.

Does the scan tool display SET?

Go to Step 8

Go to Step 5

Test for an open or high resistance in the park brake switch signal circuit. Refer to Circuit Testing in Wiring Systems.

Was problem found?

Go to Step 6

Go to Step 7

Repair the open or high resistance in the park brake switch signal circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 9

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Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 9

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Replace the park brake switch.

Is the replacement complete?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3