I had a problem on my 92 where the seat would intermitantly stop working, tuned out to be a wire had rubbed thru and was shorting out on the seat frame.
Before removing the seat you may want to inspect the underside wires to motor carefully. as I repaired mine without removing the seat.
Try moving the wires around while moving the seat control to see if you get any more movement!
Just thought I'd "Chime in"