Do you have your stock stereo?? The only way I could think that your RCA's would cause it to go to protect is if the rca came loose behind the stereo and the middle pin is touching ground...I'm sure theres other ways but I'm dead tired...I'm at my second job for the day...
n e wayz if its stock your gonna wanna get some ford removal keys...but I'm assuming it's not so u got 2 ways, get some radio removal keys...which I doubt u have being the 2nd owner, so you can take off the whole oval piece that goes around the stereo and heating/ac controls, just pry it off and it reveals you dash kit that either should be with two 8 mm or 7 mm....or just clips
