trithumb

So i just wired up my head unit and did a mock up connection to make sure i wired everything right. Radio works great. When i put the nav in and turned it on it took a second to find my location. I hit navigate and several things are gray and i can only hit history and POI i cant type in the address. or anything like that. would it have to do with the fact that i havnt run the ebrake cable yet? I was able to get it to navigate me to a local poi.