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

Connector End View Reference: Lighting Systems Connector End Views or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Verify that the daytime running lamps (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 ON the ignition, 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 (BCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

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