Circuit/System Testing
- Release the brake pedal. With the scan tool observe the Brake Switch Status data parameter.
- If the fault is current, the scan tool brake switch status displays ON.
- If the scan tool displays OFF, go to Testing for Intermittent Conditions and Poor Connections .
- With the ignition OFF, disconnect the EBCM connector. With the Ignition ON release the brake pedal and connect a test lamp between the stop lamp switch signal circuit and ground.
- If the test lamp illuminates go to Symptoms - Lighting Systems .
- If the test lamp does not illuminate, replace the EBCM/ brake pressure modulator valve (BPMV) assembly.