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HVAC Control vacuum line diagram?

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Old 11-30-2009, 05:52 PM
Rudebaker Rudebaker is offline
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Default HVAC Control vacuum line diagram?

Anyone have the color code diagram showing what line goes to what position on the back of the HVAC control? It originally had AC but someone removed it. Besides having cut the vacuum line for the controls at the engine and stuffing it under the heater core cover they pulled all but one of the lines off the leads to the control. Of course only one of those is color coded the rest were all black. In addition one line under the dash is presently MIA. I did get it so I can switch between Defrost and Heat or Vent but which is Heat and which is Vent I couldn't tell you. I capped off the control lead I couldn't find a line for right now but I really would to make everything (that's left) work correctly if possible. WHY do people do things like this?!

Is this shown in the factory service manual? If so I'll go ahead and buy one.
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Old 11-30-2009, 08:33 PM
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Hi,

Hopefully this will help - http://ramchargercentral.com/index.p...sa=item;id=487
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Old 11-30-2009, 09:18 PM
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I do believe that's what I'm looking for. Thanks!!! I went ahead and ordered the FSM too.
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Old 11-30-2009, 10:44 PM
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Hey,

Where did you order the FSM from?

Thanks!
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Old 12-01-2009, 08:28 AM
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Hey,

Where did you order the FSM from?

Thanks!
eBay, there were several on there, just do a search for "Dodge Truck service manual". Average price seems to be around $40 depending on year.
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Old 12-01-2009, 04:08 PM
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Got everything hooked back up, it's actually upside down and reverse of how it's shown in the diagrams but once I figured that out everything started working and I even get decent heat out of it now. Thanks, hope I can return the favor.
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Old 12-01-2009, 11:44 PM
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Hi,

Im glad the diagram worked for you!

You will have to let me know how that FSM works out for you as i may be interested in buying one also.

Do you know by chance if theres an aftermarket A/C bypass pulley available for these 318's as my A/C Clutch is starting to drive me nuts with its constant squeeking. I can order a remaned clutch from where i work but am trying not to put alot money into this truck, lol.
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Old 12-02-2009, 12:35 AM
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you could run a belt from the main pully to the alternator. it should be the same size as the one that goes around the waterpump and power steering pump. just an idea.
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Old 12-02-2009, 08:02 AM
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Hi,

I thought about that yesterday but it looks like the water pump would be i in the way of the belt if i were to run in from the crank pulley to the alt.

Ill have to double check today.
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Old 12-02-2009, 08:38 AM
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Hi,

I thought about that yesterday but it looks like the water pump would be i in the way of the belt if i were to run in from the crank pulley to the alt.

Ill have to double check today.
If your alternator has a double groove pulley you put the belt in the forward grooves and the belt clears the water pump. That's what they did on mine. IIRC it uses the factory belt for a 318 w/o AC.
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Old 12-02-2009, 08:38 AM
 
 
 
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