Defrost Help!!!

So i was able to go take a look at my car. I don't think that it is getting vacuum. I found the two vacuum hoses underneath the dash on the passenger side, and when I pulled off both neither had suction. I also found one on the drivers side where there's a vertical rod coming off of it. it didn't have suction either. So I think I need to back up and take a look at the intake manifold now...