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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 226 (Testing Wiring Systems For Intermittent & Poor Connections) >> Testing for Continuity >> With a Test Lamp

With a Test Lamp

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  1. Remove the power feed (i.e. fuse, control module) from the suspect circuit.
  2. Disconnect the load.
  3. Connect 1 lead of the test lamp to 1 end of the circuit to be tested.
  4. Connect the other lead of the test lamp to battery positive voltage.
  5. Connect the other end of the circuit to ground.
  6. If the test lamp illuminates (full intensity), then the circuit has good continuity.
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