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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Automatic Transmission Diagnosis - 4L80-E) >> Diagnostic Tests >> DTC P0719: Brake Switch Circuit - Low Input >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 4

    This step tests for stoplamp switch voltage to the PCM connector.

  2. 7

    This step isolates the stoplamp switch as a source for setting the DTC.

  3. 10

    This step tests for a short to ground in the ignition 3 voltage circuit (441) to the stoplamp switch.

  4. 12

    This step tests for a short to ground in the brake switch signal circuit (420), from the 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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