Drivers power seat will not move forward or back.

Check first to make sure there is nothing caught in the track or under the seat or there maybe a bad wire on the power motor itself and yes there should be a fuse or relay check under the dash for the box there and the diagram will tell if you if one is there or check the relay box under the hood for the relay for it

I just finished 'repairing' in my '00 Outback wagon, which moved forward inconsistently, and never completely lifted the front edge of the seat up.  We like to move it back when we get out. Up to now, we had learned we could move it forward by hitting it like a karate chop (not good) !  
   I removed the 4 bolts mounting the seat to the floor, tilted it back, popped the toggle switch handle off & removed the 2 screws holding the side cover.  (I discovered the switch WORKED now!)
   I then disconnected the switch harness & bent the plastic cover back far enough to unscrew the switch from the inside. I inspected & spray-cleaned the switch, & in re-installing discovered the switch front plastic lobe (or knob) that snaps into the handle was loosening & finally broke off!  It works just using the rear lobe without the handle on.  
   I left it hanging beside the seat for now until I order another switch.  But, also, the rear inner screw that mounts the switch stripped during attempted re-installation, which I will have to address.  
Bottom line:  it was a mechanical failure, not an electrical one!  I could re-install without the handle & it would work.  Ugly.  Other bottom line: this was my teacher-wife's commuter car, I am inheriting it this summer when our new 2010 Prius arrives! It has 190,000 miles on it !          
magic marty