Where does this hose go?

[ampsman]

Under dash on passenger side. Just saw it hanging there.

[Pyrate2010]

Looks like A/C drain hose, if it is it goes out the firewall.

[ampsman]

I can’t seem to find where it should connect under the dash though.

[SJTD]

If it's the drain there's a nipple on the back of the A/C housing at the bottom. Points toward the firewall.

[kec74]

I was just chasing vacuum on my truck, and that looks like the heater vent box air solenoid line. On the passenger side is the one that opens the box, drivers side above the tunnel is the one that switches floor and defrost. See if its pulling vacuum at any time as the heat controls cycle.

[ampsman]

Thanks. I'll check when I get home. Its weird cause I have been under the dash before and dont remember that hose and cant for the life of me figure out what it connect to.