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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1680 (Wiring System (OEM) Troubleshooting And Diagnosis) >> Diagnostic Information and Procedures >> Troubleshooting with a Test Lamp >> Testing Procedure

Testing Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to TEST PROBE NOTICE in Cautions and Notices.

A test lamp can simply and quickly test a low impedance circuit for voltage.

The J 34142-B  is Micro-Pack compatible and comprised of a 12-volt light bulb with an attached pair of leads.

To properly operate this tool use the following procedure.

  1. Attach one lead to ground.
  2. Touch the other lead to various points along the circuit where voltage should be present.
  3. When the bulb illuminates, there is voltage at the point being tested.