We understand that your problem is:
I have a 1996 Toyota Landcruiser. My passenger side power seat no longer moves back after a trip to the car wash (they moved it forward and couldn't get it to move back). As I look under the seat I see that the pass door side threaded rod is spinning and moving a fraction of an inch back and forth but the driver side threaded rod isn't moving at all. Does this indicate an electric malfunction or is it possible that when the car wash guys moved my seat forward to vacuum that a coin got stuck in the driver side railing? (again still discussing the passenger seat only) And if it is a coin stuck in the railing what is the easiest way to fix since I can't see in the railing and if it is an electrical issue, is there a way to manually override the system so I can move my seat back?