I was putting in an aftermarket radio in my 1990 century, i did not avhe the money to buy the correct harness, so i just got a wiring diagram and cut fof the factory harness and used wire connecters to connect all the wires correctly, unfortunately, my jvc radio did not ahve a wire for the power antenna, so now, when the battery is plugged in, the antenna continually tries to move up, but doesn't, and does not stop at all, is tehre any way that i can jsut turn off the motor for the power antenna, or how can i fix this, thanx.