navigation key pad not working?

Hey everyone I figured it out, I had connected the green break wire at the same spot as the one for the avh-p6600 dvd. Like I said befor the dvd player worked so I thought if I hooked the one for the nav unit at the spot it would work but it did not. I had to hook it to the black wire after the black box going into the nav unit. It works great now. I hope this helps anyone els withe the same problem.