My son has an 84 Berlinetta and the radio antenna motor will not shut off even after the ignition is turned off. We've had look under the hood but it isn't apparent how to get to the antenna motor. We've disconnected the battery to make it stop, and hoped that might be a quick fix, but when we reconnect it starts up again. Anyone ran into this problem? Is there a wiring diagram for this car on a web site somewhere and how do you get to the antenna motor?