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Dear kirke333,
May this find you well. The problem is almost certainly in the switch assembly or the seat computer: the seat motors rarely fail (sometimes a drive cable is worn to the point where the motor no longer will turn it).
There is no way to move the seat manually, when the motors fail.
The seat switch sometimes ceases to work, because it is filled with dirt/debris. Sometimes, solder joints on the circuit board develop microscopic cracks. These are just enough to keep power from flowing. You can reflow the solder, using a 15-25 watt soldering iron.
Before you do this, do you hear the seat computer's relays operating, when you press the switch buttons? If not, that may be the source of the problem. The seat computer is affixed to the underside of the seat. You should be able to get a replacement from a salvage yard.
The seat can be removed. It is secured by four bolts, one at each end of the seat track. Please read carefully, the following:
DEATH DANGER WARNING: Before trying to remove the seat, remove the negative battery cable clamp from the battery terminal, and put the clamp in a plastic bag, to isolate it. This cuts power supply to the SRS (Airbag) System. The airbag sensor is under the driver's seat, affixed to the floor pan. If this sensor is banged - if you drop the seat on it, or drop a tool on it - the airbag could deploy. This can be lethal, at close quarters. It will also be costly: a new sensor is about $1,200. A new airbag is about the same. You should wait 30 minutes before starting work, after you cut power to the vehicle. Have the radio security code handy: you'll need it to restore the radio to service.
Hope this helps.
Yours faithfully,
Spook
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