I tried to do a search but nothing came up. I remember reading on this forum that "somewhere" in the dash is a vacuum connector, or connectors, that can screw up the A/C, and cause a vacuum leak. Has anyone ever done a write-up or fixed this problem before? I've checked all the vacuum connectors under the hood and they're all good. I have a vac leak somewhere in my A/C system and can't pin it down.

 

The check valves may be bad (black round things inline with those hoses you checked under the hood), and if you have cruise control there is a hose and CC module under the battery tray you need to look at.

 

You might also want to check the hoses going to the 4x4 shift motor on the back of the passenger side front axle. And here is a good thread about the check valves https://dodgeforum.com/forum/2nd-gen...ild-vents.html

 

don't miss post # 28, 31, 39 and 55.