to prevent of backfeeding i was thinking using zener so it would be only one way,we will see,still didnt received the vehicule so still have time to do my research.

We did a 2012 altima and it was not easy at all,we had the help off someone in the usa who did a wifi modul for us,it was not easy at all,it was try and fail a couple of time,but he doesnt have any idea this time.For the altima it was the wiper and windshield juice.