1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

A/C question

Old Jun 23, 2010 | 06:53 PM
  #1  
sweetv8s10's Avatar
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Does anyone how to bypass the stupid little box that is on the low pressure line becuase I think it is messed up.It wont let the compresser engage unless I move it around a little then it will engage then when I stop messing with it it will disengage again its really making me mad!
 
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Old Jun 23, 2010 | 07:10 PM
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Are you talking about the switch up by the firewall on the passenger side?
 
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Old Jun 23, 2010 | 08:40 PM
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just connect the two wires on the back of it. that will get you by, but i would recommenced getting a new high pressure switch as that it the only thing that protects your ac system from blowing up if something goes wrong
 
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Old Jun 23, 2010 | 09:20 PM
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Yes Im talking about the one on the passanger side by the firewall its got some kind of temp probe on it also.
 
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Old Jun 23, 2010 | 09:31 PM
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I think that cuts the compressor on and off when it gets where it needs to be but Im not 100%
 
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Old Jun 23, 2010 | 10:36 PM
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Does anyone know where to get a new one?
 
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Old Jun 23, 2010 | 11:01 PM
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Should be able to pick one up at the auto parts store or Dodge worst case scenario

---AutoMerged DoublePost---

Murray 35800 - System Mounted Cycling Pressure Switch 1989 Dodge W250 | O'Reilly Auto Parts
 

Last edited by jasonfriedlin; Jun 23, 2010 at 11:01 PM. Reason: Automerged Doublepost
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Old Jun 23, 2010 | 11:14 PM
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Mine dosent look like that its a little black box with a temp probe.I have tried to find one at the autoparts store but they dont have one this sucks!
 
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Old Jun 24, 2010 | 11:12 AM
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Can you post a picture of what your talking about and Ill see if I can figure out what it is?
 
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Old Jun 24, 2010 | 04:20 PM
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pic
 
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