help!! ford radio, 2007r with cd changer lead

hi can anybody help me, i have a radio 2007r with cd changer control, does anybody know if it is possible to trick the radio into thinking cd present
so i can use an aux input on that controller lead, without purchasing a new ford stereo, i want to keep the joystick controller, post or email, thanks new to this forum, have good knowledge of wiring and electronics.
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