The fact that it is experiencing concern with both seats, I would suspect a connection issue at either the driver/passenger seat to body harness connector, or the seat module. There is no relay, nor an independent seat heater module. Both seats share a common power, and a common ground through the memory seat module. The way the system works, is the heated seat switches are wired to the respective door modules, and the door modules send bus messages to the seat module for operation. Open/high resistance elements, could cause this concern. But you would have to have at least one on each seat.
Tuesday, February 22nd, 2011 AT 6:13 AM