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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1920 (Door Lock System And Door Handles) >> Diagnostic Information and Procedures >> Fuel Filler Door Release Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the fuel door release actuator.
  2. Connect a test lamp between control circuit terminal A and control circuit terminal B.
  3. Ignition ON, command the door locks to LOCK and UNLOCK by using the driver door lock switch. The test lamp should illuminate while commanding the LOCK and UNLOCK states.
    • If the test lamp is always ON, test both control circuits for a short to voltage.
    • If the test lamp remains OFF, test both control circuits for a short to ground or open/high resistance.
  4. If all circuits test normal, test or replace the fuel door release actuator.
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