WHat controls the selector switch in the jeeps. I have a 98. And it only works on defrost? I have my AC torn out if it makes a difference

 

check your vaccum pod then your vaccum lines. The vacuum pod should be behind the passenger hand side of the bumper.

 

Is that the round ball thing behind your bumper cus I have all custom bumpers

 

Yes, it's the ball. Most people with custom bumpers relocate them under the hood. By relocate I mean shorten the hose and wedge it in somewhere.

 

Yup that's how mine is

 

Well check the ball and all your vaccum lines for cracks and such. Easy way to check for cracks you can't easily see is to spray the lines with starter fluid with the engine running, if theres a crack you'll hear a change in the idle for a second.

 

Ok great should I follow just the vacuum lines off the ball or any others?

 

check the ball first, then just check them all connecting off from it.

 

Cool. I know I have a vacuum hose just hanging out in the middle of nowhere I'll have to get a picture of it.

 

I'd say thats your problem.

 

The hose that runs to the ball connects to a T splitter along the inside passenger drivers side.