Re: Low Pressure AC Port
It's in a very bad spot on my Navigator. I'm sure it's in the same spot on your Expedition. It's on the accumulator which is on the passenger side, at the firewall. near the blower motor. You have to remove some stuff to get to it.
You would think it would be in the spot of the high pressure port which is highly visible and accessible. In every vehicle I've ever owned, those two ports were very easy to get to.