Does anyone have a clue why my passenger's heated seat will stay on forever as long as the driver's isn't on. Once the driver's seat is turned on and is on for about 15 seconds or so they both shut off. If the driver's seat is turned on by itself it will only stay on for about 30 seconds or so then shut off. originally i thought it might be a bad element in the driver's seat but now i'm confused. Any held would be appreciated. Thanks in advance. -Garrett