Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List

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. Press and release the brake pedal.
3. Observe the stop lamps.

Are the stop lamps illuminated?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

Using a scan tool, observe the BPPS Sensor Voltage parameter.

Does the scan tool indicate more than 1 volt?

Go to Step 4

Go to Step 5

1. Recalibrate the brake pedal position sensor. Refer to Brake Pedal Position Sensor Calibration.
2. Press and release the brake pedal.
3. Observe the BPPS Sensor Voltage parameter.

Does the scan tool indicate more than 1 volt?

Go to Step 6

Go to Step 9

Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

Inspect for poor connections at the brake pedal position sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

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

Did you complete the replacement?

Go to Step 9

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Replace the brake pedal position sensor. Refer to Brake Pedal Position Sensor Replacement.

Did you complete the replacement?

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 2