On the d3 i did the bpass and it works fine but when i plug the nav in it knows i am moving and does not let me watch video. does this has to happen or is there something i can do.

Then you did the bypass wrong

What do you mean when you say you " plugged the nav in"?

Because you can't just plug it in, it's part of the unit.

you didnt follow all the directions for the bypass

i did thy bypass like it said, i moved the mute wire up and grounded both that and the green brake wire. but it only worked when the nav antenna was not plugged in. i also disconected the speed wire is that the problem.

no, your repinned mute wire is not making a good connection

why would it work at all then if it is not connected

loose connection=sometimes it works, sometimes it doesnt

i just drove 9 hours watching dvds with no problem with the gps not hooked up when i plug it in it the dvd does not play while driving. what significance does the antenna have with this bypass

That means that your deck is using satellite info to lockout video. That also means you did the bypass wrong or it wouldn't do that

i just drove 9 hours watching dvds with no problem with the gps not hooked up when i plug it in it the dvd does not play while driving. what significance does the antenna have with this bypass

how did you guy resecure the mute wire when you moved it..... i just stuck it in there could this be the problem

Had the same prob my first D3 install. Some times the wire as you may think its plugged in but its not making the right connection to metal pin from the H.U