installed my new clarion cz702 yesterday, and it wont turn on. i installed the wires correct (yellow to constant, red to switched, and black to ground). i did make one idiot mistake though. didn't disconnect the battery before install, and some wires touched causing a small spark (it was night time so spark was visible). so i'm wondering if the head unit is done, or if it's just a fuse? the fuse on the headunit is fine, and i checked the one in the glove box labeled "radio" it was fine. are there any other fuses i should check?