Lucerne V6-3.8L (2007)
2. Ignition OFF, test for less than 10 ohms of resistance between the heated and cooled seat switch low reference circuit terminal 3 and ground.
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If greater than 10 ohms, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door module.
3. Connect the harness connector at the heated and cooled seat switch.
4. Ignition OFF, disconnect the (C4) harness connector at the door module.
5. Connect a 3A fused jumper wire between the low reference circuit terminal 4 and ground.
6. Connect a test lamp between each indicator control circuit terminal and battery voltage. Each indicator should illuminate when tested.
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If any indicator does not illuminate, test the appropriate control circuit for short to ground or an open/high resistance. If the circuit test normal,
replace the heated and cooled seat switch.
7. If all indicators illuminate, replace the door module.
Passenger Heated and Cooled Seat Switch Indicators Inoperative
1. Ignition OFF, disconnect the harness connector at the heated and cooled seat switch.
2. Ignition OFF, test for less than 10 ohms of resistance between the heated seat switch low reference circuit terminal 5 and ground.
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If greater than 10 ohms, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door module.
3. Connect the harness connector at the heated and cooled seat switch.
4. Ignition OFF, disconnect the (C4) harness connector at the door module.
5. Connect a 3A fused jumper wire between the low reference circuit terminal 4 and ground.
6. Connect a test lamp between each indicator control circuit terminal and battery voltage. Each indicator should illuminate when tested.
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If any indicator does not illuminate, test the appropriate control circuit for short to ground or an open/high resistance. If the circuit test normal,
replace the heated and cooled seat switch.
7. If all indicators illuminate, replace the door module.
Heated and Cooled Seat Switch Indicators Always On
1. Ignition OFF, disconnect the harness connector at the heated and cooled seat switch.
2. Ignition ON, heated and cool seat OFF. Test for less than 0 volts between the illuminated indicator control circuit and ground.
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If greater than 0 volts, test the control circuit for a short to voltage. If the circuit tests normal, replace the door module.
REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests and Procedures
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Heated and Cooled Seat Switch Replacement
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Control Module References for door module replacement, setup, and programming. See: Testing and Inspection/Programming and Relearning
