LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Warning Indicator Always On >> Circuit/System Testing

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel lamps OFF. Verify the Red Brake Warning indicator turns OFF.
    • If the Red Brake Warning indicator does not turn OFF, replace the IPC.
  2. Disconnect the park brake switch. With a scan tool, observe the Park Brake Switch parameter. Verify parameter is reading ON.
    • If the parameter is OFF, replace the park brake switch.
  3. Test the park brake switch signal circuit for a short to ground. Verify no short is found.
    • If short is found, repair the circuit.
  4. Replace the BCM.
scientia non olet · About LEMON Manuals