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With a Test Lamp

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  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 battery positive voltage.
  4. Connect the other lead of the test lamp to 1 end of the circuit to be tested.
  5. If the test lamp illuminates, there is a short to ground in the circuit.
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