Try looking for loose connection of wire.
The plastic pinion and worm gears in the reduction case that the motors are attached to wear out and break when the seat track become sticky or rusted due to the torque being created. 2010 Ford Escape
So does it have power to go up and down. May have a stuck motor or it's bad. May need to remove the seat and bench test the seat motors. Replacement may be needed
SOURCE: 2004 Jeep Cherokee Laredo Power Seat
Rocking tells me that something in the mechanism is broken. failure to move with switch could mean that either what broke or something else has jammed the track. If you are good at this kind of thing, remove seat (4 bolts & unplug harness) and flip it over if you can't see anything installed.
It could have broken because it was ready to break but that's why I don't loan my stuff to anyone! (when something breaks then it's my fault) If parts turn out to be really expensive, you can likely find a working seat in a junkyard for pretty cheap.
good luck with it...hope its something small & easy!
Testimonial: "Thank you for the advice, the seat was broken at the electronic frame, replaced it with a used one from scrapyard."
SOURCE: power seat switch
It is most definitely the seat slide motor. Most infiniti drivers seats have three different motors. I30, I35's and QX4's all had problems with the seat slide motors. You can tap on the slide motor which is under the front of the seat and it will probably work for a little while, but it WILL stop working completely. There was actually a Technical Service Bulletin regarding this issue because there were so many vehicles that had this problem. I hate to see that guy waste money trying to get a circuit board rebuilt that absolutely will not solve the problem.
SOURCE: Driver seat not moving back and forth
under the seat is a thin wire that goes from one side to the other it has most likely broke you need to find the secondary lock it was connected to and release it to move the seat but you must also release the main lock so i suggest replacing the wire . THIS IS FOR MANUEL SEATS
now as for power seats you will have to locate the power lead wire and make sure it is not broke if so you can replace the connecter with an aftermarket one and it may work again
SOURCE: power seat control not working to move seat back.
that is easy find the motor under the seat that moves the seat back and forth take and neg wire and a hot wire carefully touch the twoo prongs going to the motor after diconnecting the plug going into the motor. it sould go forward one way and croos the wires to get it to go the other way if this works get a new switch and have a working seat.
SOURCE: drivers seat 2000 outback
So here is a diagram of the seat circuitry for your car. Since every other function works except the forward/backward slide function, that leaves basically the forward/backward slide motor, the seat switch, and/or the wiring. If you can verify that the wiring under the seat is in good condition without obstructions, chaffed wires, and/or wires pulled too tight, then it's safe to say it's down to just the motor and/or the switch. Sometimes if the passengers front seat has the same switch, you can plug it in to the drivers' side connector and see what works and what doesn't. If the seat works fine with the other switch, then that's all it needs, if not then it will need a motor. If the other seat doesn't have a switch then you can find them at wrecking yards, or just supply power and ground to the motor in question to see if it works. If it does, then you know you kneed a switch and if not then a motor.
I hope this info helps!~subyguru~
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