I know I have a vacuum issue somewhere but can't locate it, I bought a new vacuum ball also. Which vacuum lines control the vents?

 

Year of Ranger?

Would need to be 1995 or later

The vacuum reservoir(ball) controls vents in cab
It should have 2 vacuum lines, one from the intake manifold(vacuum source), the other runs to and thru the firewall, both are black

If you look under the glove box far passenger side you will see TWO vacuum lines coming in, black one is from "the ball", white one changes to Grey in engine bay and goes to heater hose bypass valve

The black line runs to climate control panel's "air direction" ****, it sends the vacuum to the flaps/panels inside the air ways to change air direction

 

I got a new vacuum ball but will follow the lines you stated to see a clog or crack thanks

 

btw it’s a 2000 with a 3.0

I did some trouble shooting and came to the conclusion that the vacuum ball is the issue or not enough vacuum. When I bypass the vacuum ball and connect the two vacuum hoses the vents work until i high rpm then it goes to defrost . I tried the old vacuum ball and new one and still won’t work.

any suggestions

 

There needs to be a check valve, either on the vacuum hose from the intake to the "ball" or in the "ball" itself

Put a hose on either port of the "ball" and blow air thru the hose, and then suck air thru hose, if you can do both then no check valve in the "ball"

So you will need one on the hose to intake, most look like this: https://static.cargurus.com/images/s...1600x1200.jpeg

Blow thru each port, you will only be able to blow thru 1 port, that port connects to the hose that goes to the "ball", other port to intake manifold


Check valve holds high vacuum in the "ball" when vacuum drops in intake, like when accelerating
Vacuum is not "used up", it can suck in air so loses "lower pressure", but it's not used up by vent system

 

thanks will try this

 

this fix it a/c running perfect thank you

 

Good work

Thanks for posting THE FIX