I installed a new Vacuum reservoir for my 98 xj 4.0 My ac blows out thru the defrost vents I turn on the fan full blast for a few minutes then lower the fan and it starts working correctly blowing air thru the ac vents. Also, the cruise control does not work...The reservoir has two outlets to insert a vacuum hose. I can allow find one hose from canister to servo cable assembly. Where does the other connection go?
Did I purchase the wrong reservoir? What about cruise control?
Any suggestions or advice.

 

Check the vacuum line that runs to and from the Vacuum reservoir that sits behind the front bump on the passenger side

 

Which one did you put in the Jeep?
Cause I am under the impression that the "pill" shaped one has 2 ports.
Thinking a '96 and down thing.
Thinking the "ball" type only having one port and being a '97 and up thing.
So let's say you have the "pill" and I am right about all this.
If this were me I would cap off the unused port and see what happens.

 

Yeah, as long at there are no leaks, there's really no such thing as a "wrong" vacuum reservoir. It's just a hollow space that won't collapse. You could make one out of a coffee can and it would work fine, if there were no leaks.

Or go big - get a SCUBA cylinder and mount it in the spare tire space.

Okay, I'm kidding, but you get the point. There's no 'wrong' possible. You have a big leak somewhere.

The old hoses might have cracked as you were working with it, or Ralph may have nailed the problem. Replacing hoses is easy, or you can cheat and cover the cracked area with some liquid electrical tape. Works great on rubber hoses. Not so great on plastic hoses.

 

 

Cruise Control not working
A lack of visual indication on your instrument cluster when you press the buttons on your steering wheel may indicate a blown fuse or a failed clock spring.

 

Here's the "pill" reservoir. The mounting tabs are behind the unit. Note the vacuum supply (large hose) tee's off to both sides on the reservoir. The connect to the ports in the rear. These have check valves built in. The ports in front then connect to the vacuum "device", the CC or the HVAC vents. Now this is for my 1988. The two vac circuits are independent once you hit the reservoir.

On the later "ball" models for 97+, you have one connection (as Cruiser's diagram shows). The CC and HVAC branch off the main vac line. If you have 2 holes, I suspect you have the wrong reservoir. However, you might get it to work. One port should have a check valve. Place a short piece of hose on it and then blow through the hose. The check valve port should stop it. Now try the other port, you should be able to blow through it and even feel some air escape the other port. The check valve side is the one you should cap off. The other side connect to your vac line.

 

So guessing some have 3, what it looks like in that shot, some have 2 ,cause of what the OP said, and some have one.
Also the little rubber elbows in that shot look a real lot like the elbow off the MAP sensor in my '00.
They really small?