Well my cadi is crashed so it was sitting for over a week and a half without turning on one day I tried turning it on I had to jump cables to it ..it turnd on ..andon the positive terminal of the battery I have two wires on is the originals car wiring harness and the other one is from the after market amp of the sound system profesional installed by best buy never had problems with it ..but when I jumped cables I disconected the one from the sound system that way it will turn on a lil faster I turned the car on took of the jumper cables and when I was going to connect the positive lead of the sound sytem the car was runjing on the alternator nothing was conected to the battery and the two positive lead one from the sound sytems and the original car wiring harness touched and the car just shut off ..I'm guessing the amp sucked all the juice the alternator was making but now nothing turns on ..the key stays on won't let me take it out does twist but won't do a thing I alewady checked every single fuse even the ones below the back seats I thought the ecm might be burned or something evrrything looked fine ..plz help