have u tested the amp since u took it out ur other car ?? as it might be ur amp puffed if you hace a old extension lead or hoover just open ur boot and bonnet connect the live to your amps live and do a temp fixing to your battery then turn on ur ar / stereo and see if that fixes it . 1 of 2 things will happen ur amp will work andthen u know thats how youll have to connect it in ur car or your amp wont work and ull have to buy a new one
