How big's the wire? Sounds like a loom (bunch of wires) to me from your description.
Best not to post pics online of the unit as it'll help the enterprising underclass to nick it if they spot the pic, but the more description you can give the better...?
Worst comes to the worst, take it to a car security shop and get them to ID it for you.
(Might also be worth a visit to Ford's to make sure it's not one of their's).