3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

AC Compressor not engaging

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Old 05-09-2018, 10:29 PM
  #16  
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Originally Posted by Intox

first thank you for replying. Now I must apologize for asking this question on 3rd gen truck forum. My truck is 2011 2500 Cummins. Are you familiar with 4th gen? Is ac the same design?
You should still have a thermistor, the newer trucks are easier to get to. They plug into a air box without disassembly, behind the glove box. IDK if it will fix your problem, but it does control the compressor.
Old 05-10-2018, 03:06 PM
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I jumped power to compressor from the battery and charged with 134a.
Today I took it to local shop and he discovered a ground short, so far. He had to push my truck to the side and he agreed to trace the short later. I believe nhe will find tipm is the source of short.
Old 05-15-2018, 09:23 PM
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Just to finish

the high pressure ground was not properly working. A in depth check revealed the tipm was the problem with the ground. Instead of replacing tipm I connected a additional ground to the ground wire coming from the high pressure switch. Also a 3 amp fuse was placed inline. The clutch engages and cold air at last
Originally Posted by Intox

first thank you for replying. Now I must apologize for asking this question on 3rd gen truck forum. My truck is 2011 2500 Cummins. Are you familiar with 4th gen? Is ac the same design?
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