i have 95 sc400 my power seat the passer side stop letting back on on side it go back a little then it go side ways and stops any one know what it could be

 

Could be a bad power seat ecu. Remove the seat if you can. It's on the bottom

 

had this happen to me.
lemme guess. it seems to pivot on the door side, the inside moves, while the outside stays in place?
I had to pull the seat out (I have absolutely no clue how I didn't break the seat in the process), I found a little white cap had unscrewed it's self. under where the cap is is a bearing, and a gear that goes to the outside track. since the cap wasn't holding the bearing where it should be, the gear backed out, and wasn;t contacting where it should to move the track.
Good luck.

 

Ill be selling some seats as a whole or for parts this weekend. Let me know.

 

What BenStoked said is a common problem and a easy diy fix. Remember you can manually move the seat forward and backward.....there is a DIY on how to manually move the seat (allows you to remove seat)...just do a search