dose any one know how to wire up a electric motor that gose on a electric seat . i have a set of saab seats in my van and i would like to get them working . the motor has two wires coming from it if you put them on a battery the seat gose forward an if i reverse the wires the seat will move back . so what i done was brought a switch that is on off on but it will not work but the one i have dose not have a seperate earth dose any one know where i can get one from .or is there another way of wireing the motor up