Originally Posted by
Volvo92906
Yeah.. what is that valve? Mine isnt hooked up. The vacuum line was just as brittle as 94 Mesquite mentioned. Just curious........
Not totally sure yet what effect it has on the inside of the truck, but I have checked what positions the valve is in with corresponding switch positions.
With the dash switch on Max A/C or Floor, the valve is actuated. All other switch positions, the valve is not.