Ac/heater Vacuum Lines

6ScubA9

Member
Oct 9, 2013
36
1
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Hello all! Brief intro: I bought a 92 Mustgang GT (pics soon) about a month ago. Good price has some upgrades but definitely a project car. The a/c has all the lines ripped out (for more hp i assume). The air only blows out of the defroster vent and from the floor (not really sure if it's from floor vents or otherwise). The defroster blows warm air but not out of the floor. I've read that it's the vacuum lines but there are a lot of them and if it's like everything else on the car it's missing some. As far as anything i've found goes on vacuum lines is to the vacuum tree, no help after that. So if someone could give me a quick rundown that would be awesome! Here's some pics with the questions i have. Thanks!

This one is on the passenger side and the hose running from the top middle of the picture comes off the split where the a/c line comes from the vacuum tree. How many hoses should come in, what are they, where do they come from? As you can see one hose is routed on two nipples, closing them off i guess? is there something that should go to this?
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and here is the bottom (best angle i could get)
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here are the hoses under passenger dash. how many hoses should go in/out, where do they come from/go?
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Diagrams courtesy of Tmoss & Stang&2birds

Under the Dash HVAC diagram
Mustang_AC_heat_vacuum_controls.gif



Under the hood vacuum diagram

mustangFoxFordVacuumDiagram.jpg


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif


Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pin out
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

87-92 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif
 
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Diagrams courtesy of Tmoss & Stang&2birds

Under the Dash HVAC diagram
Mustang_AC_heat_vacuum_controls.gif


Under the hood vacuum diagram

mustangFoxFordVacuumDiagram.jpg


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif


Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pin out
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

87-92 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif
Thanks! That's a lot of info to go through and definitely appreciate it!! I was hoping for "looks like you're missing (applicable hose)" or something to the effect. The diagrams are confusing and was hoping for color real life pics.