When I got the D3 the harness was already hacked. Mute wire was moved up and everything. The audio guy couldnt figure out if the mute wire was already moved up and everything why didn't the hack work. I watched him move the wire from the top to the bottom 4 times trying to see what was wrong with it. He was calling around to see if anyone has ever had the same problem. He research online he saw that he did the hack proper but it just wasn't working. So i dont think its the harness it has to be the unit:(