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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 >> Power Door Locks Malfunction >> Component Testing

Component 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.

Door Lock Switch

  1. Ignition OFF, disconnect the harness connector at the driver door lock switch.
  2. Test for infinite resistance between the signal terminals 3 and 1 and the ground terminal 2 with the switch in the open position.
    • If less than infinite resistance, replace the driver door lock switch.
  3. Test for less than 2 ohms between the signal terminal 1 and the ground terminal 2 with the switch in the LOCK position.
    • If greater than the specified range, replace the driver door lock switch.
  4. Test for less than 2 ohms between the signal terminal 3 and the ground terminal 2 with the switch in the UNLOCK position.
    • If greater than the specified range, replace the driver door lock switch.

Door Latch Assembly

  1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
  2. Install a 15A fused jumper wire between one of the control terminals and 12V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the door latch should perform the LOCK/ UNLOCK functions.
    • If it does not perform as specified, replace the door latch
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