So I just put in a new controll unit and now I have controll of the heat, AC ect ect. but it wont change from Def, to floor ect it says its changeing on the unit, but its not. What Vac. line should I check first? there are sooooo many. Also I will post a picture of a line that I found broke that runs from a T at the Throttle body and along the valve cover over to the passenger side and its broken and I cant find the other part. I caped it off. Also I did the self Diag. on the unit and it has a Code 04. What is that?