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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1125 (Wiring Systems And Power Management - Service, Troubleshooting & Diagnosis) >> Troubleshooting with a Test Lamp >> Procedures >> When testing for ground:

When testing for ground:

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Attach one lead to battery positive voltage.
  2. Touch the other lead to various points along the circuit where ground should be present.
  3. When the bulb illuminates, there is ground at the point being tested.
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