power antenna

[shonky12]

hi

got a disk player thats got wires for 4 speakers, constant power, acc power, earth, remote wire but no antenna control wire,

was wondering how to wire a aftermarket power antenna up so it only goes up when listening to the radio but go back down when you use usb/cd as well as when the keys off

is it possible to make a circuit that brings the antenna half way up and flick a switch to go all way up

[Bourbonated]

It is possible to simply put a switch in that allows you to control the antenna, but as far as I know, the amount the antenna raises is dependant on how much current is run to it... And I don't know if there is any variable current switches around. No matter which one of those wires you connect your antenna too, it will go up when your system powers up (Constant, ACC and Remote Wire).