heat &a/c vacuum

Heating / Cooling / AC

  1. Aaron Johnson

    Aaron Johnson Member

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    Does anyone have the diagram of where the 3 heat and a/c vaccum hoses under the hood hook up and how to tell which is which,1969 Dart. TIA
     
  2. Joey4speed

    Joey4speed FABO Gold Member FABO Gold Member

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    Not sure what you are asking for.
    3 heat and A/C vacuum?
    Are you talking about the 3 lines from an A/C manifold guage? Or
    Are you referring to where the hoses mounted in the engine compartment?
    Do you have original A/C or aftermarket, and 6 cyl or V-8?
    Joe
     
  3. Aaron Johnson

    Aaron Johnson Member

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    its v-8 factory a/c.im talking about the 3 lines coming out of firewall.I know 1 goes to intake and other 2 go to heater water valve.But im not sure which one goes to which.only marking is a red line on 1 line
     
  4. Joey4speed

    Joey4speed FABO Gold Member FABO Gold Member

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    Im guessing you are talking small block, with heater hose going to intake.
    I have a pic here of my FW stripped, but its a BB w/o AC. I'll see if I have a pic of a complete Small block with AC.
    Screenshot_20201004-115200_Gallery.jpg
     
  5. Joey4speed

    Joey4speed FABO Gold Member FABO Gold Member

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    I cant find a good pic of a complete small block installed in a 69 Dart, with AC.
    Maybe someone here can share their's?
     
  6. 1994redram

    1994redram FABO Gold Member FABO Gold Member

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    I would also love to have a schematic for the HVAC vacuum lines. Mine is a 1970 dart. But im sure they're the same.
     
  7. Aaron Johnson

    Aaron Johnson Member

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    yes i think they are.mine has 3 vacuum lines coming thru firewall,1 to vacuum cannister and it goes to engine and then
    2 to heater water valve
     
  8. 1994redram

    1994redram FABO Gold Member FABO Gold Member

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    Thats how my car is. The solid black hose is vacuum supply. And the black/red stripe and black/white stripe go to the valve. Currently my valve will open but it won't shut by itself. There isn't any vacuum supply to it.

    20201004_125944.jpg
     
  9. Aaron Johnson

    Aaron Johnson Member

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    Thank you for the help.That was what i needed
     
  10. RealWing

    RealWing FABO Gold Member FABO Gold Member

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    red striped hose to rod side of the water valve, white stripe to other side.
     
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    • norshorblufish

      norshorblufish By the Big Water

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      I know I'm a little late to this. Maybe it can help someone else.
      These are for 1968 Valiant or Barracuda but they may work for Dart and possible 69s also.
      I added an electrical diagram also. This are form 68 service manual.
      68barracuda a-c fig 8.jpg 68barracuda a-c fig 9-10.jpg 68barracuda a-c fig11-12.jpg 68barracuda a-c fig 13- 14.jpg 68barracuda a-c electrial.jpg
       
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