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Home >> Chevrolet >> 2004 >> Impala LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 557 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the Power seat switch.
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance.
  3. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal G and ground.
    • If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance.
  4. Connect a test lamp between B+ circuit terminal F and ground terminal A. The test lamp should turn ON.
    • If the test does not turn ON, test the B+ circuit for an open.
  5. Reconnect the harness connector at the power seat switch and disconnect the harness connector at the seat motor. Connect a test lamp between control circuit terminal 1 and control circuit terminal 5.
  6. With the power seat switch command the seat UP and DOWN. The test lamp should turn ON when commanding the seat UP and DOWN.
    • If the test lamp remains OFF during either of the commands, test for a short to ground or an open on either control circuit. If the circuits test normal, replace the seat switch.
  7. If all circuits test normal, test or replace the seat motor.
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