Hey guys on my 06 g35 coupe, I have the stock navigation with the Bose system. Also I’m installing a pioneer avic-D3 HU double din, I found a wire color white and green I try it but it was giving me the wrong reading because I was doing 30mph and it said I was doing like 8mph and I also had the gps antenna on, so I don’t know what I have done wrong....please help