I have an avic n1 installed on my 00 cavalier, i bought a n3 headunit, and i wanted to test it, since i have everything already hooked up. The stereo turns on and everything works, buy no noise, either from buttons, or music. I only get noise via RCA, so i only get bass from my subwoofer. Does anyone know what can be wrong? Because when i put my N1 back on car, all noise and sound work. Thanks.