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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Engine Controls - Self-Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0719: Brake Switch Circuit - Low Input (4L80-E A/T) >> Test Description

Test Description

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

  1. 4

    This step tests for TCC/Stoplamp switch voltage to the PCM connector.

  2. 7

    This step isolates the TCC/Stoplamp switch as a source for setting the DTC.

  3. 10

    This step tests for a short to ground in the brake fuse circuit (CKT 441).

  4. 12

    This step tests for a short to ground in the TCC brake switch signal circuit (CKT 420), from the TCC/Stoplamp switch to the PCM.

  5. 13

    This step isolates the PCM as a source for causing the fuse to open.
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