j-wigg

88 gt vert.
any idea where the defrost door vacuum motor is or near?

the ac only blows through the window vents. doesnt matter what setting its on. i have my interior(still)apart (glove box, center console, no carpet). there is 1 (black, yellow) vacuum line that is not connected. the diagram for the ac controls say its for the panel - defrost door vacuum motor. its connected on the back of the ac switch module but need to know where the other end goes. hoping this fixes the issue. sounds like it. thanks

mjr46

defrost is the default , you need to inspect the supply line going through the firewall where evaporator lines are, most likely that line has broken = look for a vaccum leak on that line

j-wigg

whats the deal with this other black/yellow line coming off the back of the ac module?i'ma go out and check the other lines today. the whole dash will have to come out to check the ones on the inside of the firewall, correct?

j-wigg

found it behind the instrument cluster. clear as day. fixed. now to get it colder