Heated Seat Element
WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
One end of the heated rear seat element is connected to ground at all times through a splice and connector under the seat. Battery current is directed to the other end of the heated rear seat element by the heated seat switch/module. The heated seat switch/module will energize the heated rear seat element when the heated seat switch/module button is depressed in the Low or High position.
As electrical current passes through the heated rear seat element, the resistance of the wire used in the element disperses some of the electrical current in the form of heat. The heat produced by the heated rear seat element then radiates through the underside of the seat cushion and seat back trim covers, warming the seat cover and its occupant.