I have a 1988 Ford Taurus with Premium Sound (Factory AMP)and I bought an AIWA CD Reciever and I also had to buy an AMP Interface and I wired everything right like it told me too. All my speakers work and everything. The radio turns on and theres no sound from the speakers. There is the sound of the radio station coming from the radio and the amp interface but its soft and hard to hear. I've been working on it for days I was wondering if some one could help me.