Hello all,
I know this seems to be a widely covered topic, but I have a 1989 V12 XJ-S that is suffering vacuum issues to the climate control system. I know I have a lack of vacuum to the system as I have replaced the engine and never properly got the climate control vacuum supply correctly installed. I was hopping if anyone knew what color the original line is that supplies vacuum to the system. I have a few lines near the brake servo in the engine compartment that seem to be candidates. Yellow/black striped?
Anyways I have recently rebuild the heater core and it works fine, but all vents are not opening. I do have the 3 fan speeds.
Thank you all and I will supply photos later.

 

Probably everything you need to know is here.

 

Thank you very much! This will fix my issues!
Dean