Do the regular seat controls work, or is the seat stuck? If it's stuck, see if the lumbar button works. The lumbar is wired separately "direct" to the motor, everything else goes through the Seat Controller under the seat. So if the lumbar works, you can rule out a power or ground problem, but chances are the Seat Controller is bad and not the Auto Drive Positioner (ADP) Controller. The whole system talks to the CANbus through the Seat Controller, the ADP only has a LIN link (local communication) to the seat. So if the Seat Controller fails, the ADP won't work either. To find out which, get it scanned with a high-end scanner that can detect the Seat Controller. If the SC doesn't show up on CAN, then chances are it's the problem and not the ADP.