Normal Operation
WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
The power seat switch is powered by battery voltage on circuit 30-AH42 (RD) and is supplied ground on circuit 31-AH42 (BK). When pressed, the power seat switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the power seat switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 2 power seat track motors that combine to move the seat horizontally (forward/reverse) and vertically (front up/down).