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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1574 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B1480: Battery Rundown Protection Circuit Malf >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step test determines if an open or short to ground exists.
  2. 3. This step test determines if a short to ground exists in the lamp wiring or internally within the BCM.
  3. 4. This step test determines if an open exists in the body wiring harness extension harness or internally within the BCM.
  4. 8. After replacement of the BCM you must calibrate the new module for proper operation.
Fig 1: DTC B1480 - Diagnostic Chart
G01640381Courtesy of GENERAL MOTORS CORP.
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