So I just got done installing my Pioneer P3300BT head unit and I cant get the video work at all. Not when im parked or while im diving. I know there is a bypass to allow video playback while driving, but im not really interested in that. I did not connect the parking brake wire, so im going to assume thats why its not working at all.

I thought I read that just grounding the parking brake wire would be good enough, maybe not? This is my first head unit install and everything went well, besides this. lol

Can anybody help?

Vehicle is a 2010 Nissan Xterra

Definitely need to do something with the parking brake wire. Some people just grounded it, others did the relay method (that what i did). I'd do the relay method if i were you.