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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1785 (Wiring Systems (General Information)) >> Diagnostic Information and Procedures >> Troubleshooting with a Test Lamp

Troubleshooting with a Test Lamp

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J34142-B  12 V Unpowered Test Lamp

NOTE: Refer to TEST PROBE NOTICE .

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

The J34142-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.