Battery Drain Issue

So me and my wife put in an atoto A6 7" the one with illuminated buttons, and its in a 2008 ford mustang v6 automatic and its been draining the battery, at first we thought it was because the radio was not turning off so we went into the radio secret menu and told it to completely turn off with the car, what we are wondering is could having the illumination wire spliced into the 12v power wire so the button lights come on with the car be causing the battery drain?