I'm not 100% sure where to put this. Since it's something under the hood, I'll start here. Went out to dinner with the wife. Afterwards, walking out to my truck we noticed a puddle under it. Did some looking around and found a very short hose sticking out of the firewall on the passenger side, below the A/C crap. I circled it in the photo. What is it? Why is it dripping water?