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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1132 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Inoperative (w/o Memory A45) >> Circuit/System Testing

Circuit/System Testing

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. Disconnect the harness connector at the seat adjuster switch.
  2. Test for less than 1 ohm of resistance between the ground circuit terminal B and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Connect the harness connector at the seat adjuster switch.
  5. Disconnect the harness connector at the inoperative seat motor.
  6. Connect a test lamp between control circuit terminal 1 and control circuit terminal 5.
  7. Verify that the test lamp illuminates while pressing the appropriate seat switch in both directions.
    • If the test lamp does not illuminate for both directions, test the motor circuits for a short to ground or an open/high resistance. If the circuits test normal replace the seat adjuster switch.
  8. If all circuits test normal, replace the inoperative motor.
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