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Heated Seat Always On

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Heated Seat Always On

Step Action Yes No
Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics 
Connector End View Reference: Power Seat Systems Connector End Views 
DEFINITION: The driver or passenger seat heaters are on when the heated seat switches are turned off.
1 Did you review the Heated Seat System Description and Operation and perform the necessary inspections? Go to Step 2  Go to Symptoms - Seats 
2
  1. Disconnect the heated seat cushion 4-way connector.
  2. Connect a test lamp from the heated seat switch signal circuit terminal to ground.
  3. Turn ON the ignition.
  4. Turn the heated seat switch OFF.
Does the test lamp illuminate?
Go to Step 3  Go to Step 5 
3 Test the heated seat switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 6  Go to Step 4 
4 Replace the heated seat switch.
Is the repair complete?
Go to Step 6  -
5 Replace the seat cushion heater element. Refer to Seat Cushion Heater Element Replacement - Front (Aztek) .
Is the repair complete?
Go to Step 6  -
6 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 2