Get a DC "on-off" switch (can be found in radio shack or any auto parts store). You have to find the wire that send power to the antenna (from the head unit) and cut it. Connect one end of this wire to the "on" of the switch and the other end of the wire to "off" of the switch. This way, the switch will bypass the signal from the head unit to not send power the the anntena. When you turn the switch to "on", the anntena will go up and vice vesa. Place the switch any where you like.