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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> Heated Seat Inoperative (Chevy and GMC) >> Component Testing

Component Testing

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  1. Disconnect the heated seat switch connector at the door module.
  2. Connect a fused jumper wire from the low reference circuit terminal 4 to ground.
  3. Verify that a test lamp does not illuminate when connected from battery voltage to the switch signal circuit terminals 6 and 7.
    • If the test lamp illuminates while the switches are in an inactive state, replace the heated seat switch.
  4. Verify that a test lamp illuminates when connected from battery voltage to the switch signal circuit terminals 6 and 7 while pressing the heated seat switches.
    • If the test lamp does not illuminate while the switches are in an active state, replace the heated seat switch.
  5. Verify that the heated seat switch indicators illuminate with a test lamp connected from battery voltage to the indicator control circuit terminals 1, 2, 9, 10, and 11.
    • If the indicators do not illuminate replace the heated seat switch.
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