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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Engine Controls - Self-Diagnostics - 4.0L) >> Diagnostic Tests >> DTC P0719: Brake Switch Circuit - Low Input >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 2

    Disconnecting the brake switch connector, jumping the circuit, and observing a status change, isolates the brake switch as the source of the DTC.

  2. 3

    If the ignition 1 voltage circuit shorts to ground, the IGN 1 fuse opens.

  3. 5

    If the brake switch is properly adjusted, then the brake switch must be replaced.

  4. 8

    Replace the PCM only after you have completed the preceding diagnostic steps.
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