Normal Operation
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
There are 2 power supplies to the heated seat relay. One power supply energizes the relay when the key is in the RUN position. This closes the relay and power is provided to the heated seat switch. When the heated seat switch is pressed, power is sent to the heated seat mats and LED. If the heated seat switch is ON when the ignition is turned OFF, the heated seat switch will be ON when the ignition is turned back ON.