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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 612 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2647: Short To Ground In DRL Ambient Light Sensor Signal Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. 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. 3.  Tests for the proper operation of the circuit in the high voltage range.
  2. 4.  Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
    3. Fig 1: Identifying DTC B2647 Diagnostic Table (1 Of 2)
    G01754797Courtesy of GENERAL MOTORS CORP.
    Fig 2: Identifying DTC B2647 Diagnostic Table (2 Of 2)
    G01754798Courtesy of GENERAL MOTORS CORP.
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