I inherited a ranger and I try to keep everything working when I got it the vacuum reservoir was removed and the 4 way valve connected to the heater core was removed from ive been slowly trying to figure it out and put it back together but i got stumped on this grey vacuum line come from the fire wall on the side of my hvac box I don’t know if it goes in the hvac box or connects to that 4 way valve.


It’s hard to see in this one just showing where everything is at.