y would you ever want the amp remote wire to the battery . if u did put a amp it will always be on . that also wouldnt have nothing to do with not getting sound since theres no amps right? the ground should go to the chassis or theres a chance you will have noise in ur system . also you should have soldered ur connections . maybe your tape job came apart and the speakers are not connected ? . if the connections are good and getting power theres not many other reasons its not working other than the headunit being bad .