Can you someone explain to me who I can keep all 7 speakers once I unistall the factory stereo. I have the AVIC-D3 and noticed that I a have an amplifier wire connector with the door tweeters and dash speaker wires, well the only wire harness I can find even crutchfield recommended has the basic 4 speaker wire setup. Please someone break it down to me in dummy terms.

Get the canbus interface for your vehicle. That's the only way your keeping the factory system working.