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Home >> Hummer >> 2008 >> H3 Adventure, Standard >> Repair and Diagnosis >> Body & Frame >> Seats >> Power Seats >> Diagnostic Information and Procedures >> Lumbar Support Inoperative >> Circuit/System Testing

Circuit/System Testing

  1. Disconnect the harness connector at the lumbar adjuster switch.
  2. Test for less than 1 ohm of resistance between the ground circuit terminal A 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 H 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 lumbar adjuster switch.
  5. Disconnect the harness connector at the lumbar motor assembly.
  6. Connect a test lamp between the motor control circuit terminals.
  7. Verify that the test lamp illuminates while pressing the lumbar 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 lumbar adjuster switch.
  8. If the circuits test normal replace the lumbar motor assembly.
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