Hi there, I have a zx14 and I am trying to install a Jvc navigation sistem (kd-nx5000). It requires the unit to be hooked up to the speed sensor. Does anybody know what wire to use. I located the speed sensor on the transmition but there is three wires or should I look for one in the conector in the back of the speedometer, there again, which one is it? Thanks for your help. Gary.