I've got a 92' 400SE in which the passenger's front seat suddenly stopped responding to the controls. From what I have seen so far, there are no other electronic components that are having problems...which leads me to believe it is not a simple fuse. Also when I checked the fuses seemed fine. I removed the switches on the doors and checking the design I reverse wired the driver's side on the passenger's to see if it was the switch...no change. So put everything back and driver's side still works fine, while passenger's side is still bad. I did some basic checks on the wiring to the seat and it appears to be getting some power. I am down to considering two components...possibly a bad relay or the controller brain under the seat. I don't know where to find if there is a specific relay for the front passenger's seat so any help would be appreciated. While the controller brain under the seat is not very accessable due to the position that the seat is stuck in. Any experience and suggestions would be GREATLY APPRECIATED! Thanks.