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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Automatic Transmission Diagnosis - 4L80-E) >> Diagnostic Tests >> DTC P1875: 4WD Low Switch Circuit - Electrical Malfunction >> 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. 3

    This step tests for a short to ground in the signal circuit (1694).

  2. 4

    This step tests for an open in the signal circuit (1694), a faulty transfer case control module (active transfer case vehicles) or transfer case switch (non-active transfer case vehicles).

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