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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 477 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Warning Indicator Malfunction >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Park Brake Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the park brake switch.
  2. Test for infinite resistance between the signal terminal A and ground with the park brake released.
    • If less than the specified value, replace the park brake switch.
  3. Test for less than 1 ohm between the signal terminal A and ground with the park brake applied.
    • If greater than the specified range, replace the park brake switch.

Brake Fluid Level Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the brake fluid level switch.
  2. Test for infinite resistance between the ground terminal A and the signal terminal B.
    • If less than the specified value, replace the brake fluid level switch.
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