i recently put an audio system into my 1996 saturn sc -alpine deck,kenwood amp,and solo baric kicker i had my stereo working fine and i just put in speakers(i used the old factory speakers for a bit) about a week later after putting in the speakers i was blasting the music and my radio shuts off and the amp and sub also went off. The radio wont go back on and i changed the radio fuse and the radio fuse in the fuse pannel. Also my defroster which is in the same circuit as the radio wont go on as well.....I installed the stereo with a friend that knew what he was doing. What could of happened?