Hey guys, the a/c on my truck was working fine, but then it began blowing the air through the vents. I have read the forums an know its a vacuum leak. The thing is that I have looked for the connection to connect the "T" looking hose and I just can't find where to connect it. If you guys have 1999 truck and could tell me where to connect the hose I would appreciate.

Thank you.

 

Hey guys, the a/c on my truck was working fine, but then it began blowing the air through the vents. I have read the forums an know its a vacuum leak. The thing is that I have looked for the connection to connect the "T" looking hose and I just can't find where to connect it. If you guys have 1999 truck and could tell me where to connect the hose I would appreciate.

Thank you.

 

The "T" is up near the firewall where the ac lines go into the cab.

 

I would think putting a check valve between the source, and the first T would be a better plan. That way the reservoir would be isolated from the source, when manifold vacuum was low. (higher pressure)

 

There is a check valve right before the T from the factory. Installing the check valve in the AC lines was Dodges way of fixing the problem is wild vents. I would honestly say the only solution I found to keep everything working (cruise, etc) is to install a vacuum pump.

 

Actually there is, It's not shown in the diagram. There is one right after the elbow coming out of the kegger. In a perfect world where the vac actuators don't leak it will work perfectly. But with 20 year old actuators they need some help. The first pic was a tsb for the early trucks that didn't have them.
http://dodgeram.info/tsb/1996/24-01-96a.htm