The heat/defrost haven't been working right on my '95 4.9 L. I checked the blend door actuator, and the entire vacuum line is gone. Any idea what size line I need and where it connects? Thanks!

 

4mm ID, it goes into the wire loom that goes into the firewall by the heater core, it connects to a vacuum splitter (for lack of better word) then on into the climate control vac line setup. I don't know if I still have pics of mine or not but someone posted the vac hose diagram for the climate control system a week or so ago so it's on this forum somewhere, thought about saving it but didn't.

It's a white hose, the splitter is white, the hose(s) leaving the splitter is also the same white color.