follow the ac lines from the firewall near heater hoses or condenser and you will find a small canister, usually about half the size of a 2 liter pop bottle, there will be aluminum or steel lines going to it usually.
Its on the Receiver Drier/Accumulator. I found a drawing of it on the site listed below.
Its on the accumulator/drier. You can find a drawing of this on the link below. Just follow the "Find Your Car's Low Side Port" icon.
Try near accumulator/drier on the firewall passenger side
The low side is on the accumulator and the high side is on the discharge line......
low-side charging port, located on top of the accumulator/drier, on the passenger's side firewall under the hood.
It comes off the accumulator/drier and looks like a air pressure valve only about 2 times bigger.
The low pressure valve is on the side of the accumulator-drier bottle. It is on the passenger side of the firewall.
its under the heating swicth
Usually at the top of the accumulator/drier at the passenger side firewall
because its colder than the external temperatue there fore it condensates
Usually against the passenger side firewall answer you can find it near a/c fittings.
The AC recharge port on a 2008 Ford F150 is located close to the hose that runs from the compressor to the accumulator. The hose is the low-pressure hose and you will notice a service fitting on the hose which is where the port is.