Chasing down the reason I don't have a working power seat for the passenger. I fixed the driver's as it appeared to be just "stuck".
Took the seat apart and the track out to get a better look. Spoiler Alert! Everything worked, so I suspect it's the toggle switches..
The motors are capped off with a plastic cap holding the lead brushes, which are in slots with springs, to keep them in constant contact against the commutator. The notched rounded end on the motor shaft need to be off the shaft and in their positions in the brush housing. KEEP AWARE THEIR ARE ALSO THIN WASHERS BEHIND THOSE NOTCHED PARTS AND BETWEEN THE MOTOR ASSEMBLY AND THE TRACK ASSEMBLY
The armature, frame and stator are all in that tube, the tube has the magnets in it..That little thin gold wire is the drive shaft of the motor to the frame the motor sits in. It's a very tightly wound steel spring.
Good shot of the part #
With the motors out you can put the driveshaft in a drill and put it in the track assembly, that will make any of the 3 functions move. My forward and back was fine, so either a bad motor or switch. You can turn them by hand too if they're clean enough.
The TRICKY part is putting it all back together. You have to push a brush back against its spring, then angle in the shaft of the motor. Then slide the housing down around it (keep in mind the magnet isn't in the center of the tube, it's offset, so the offset end is away from the commutator)
Better shot of the brushes. I cleaned mine with a rounded file..
THEN the fun begins, putting the motors back in their OEM position. The driveshaft ends are square, so if you align the slot in the motor to align with the driveshafts as they sit in the track assembly, then come in at an angle, always keeping the motor casings firmly against the brush housing you can get it back, then keep pressing it together while you hand tighten the long screws holding the whole assembly together.
I don't have any pics of the power seat switch, but it's actually quite cool and full of copper plates. I suspect mine isn't making a firm enough contact to cause the motor to engage.
Hope you enjoyed!