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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 210 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Warning Indicator Malfunction >> Circuit/System Testing >> Park Brake Switch Malfunction

Park Brake Switch Malfunction

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  1. Ignition OFF, disconnect the harness connector at the park brake switch.
  2. Ignition ON, verify the scan tool BCM Park Brake Switch parameter is Released.
    • If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the BCM.
  3. Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool BCM Park Brake Switch parameter is Applied.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance.
  4. If all circuits test normal, test or replace the park brake switch.
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