It is on the accumulator.
The port is located on the firewall, top/center.
The low pressure service port, which is the smaller one.
ac charge valve location on 1999 ford pu
At passenger side of engine, around coolant overflow bottle. Piece of tubing, with pressure port sticking out. Usually has cover, with L marked on it.
From the same port you would charge the front ac this is under the hood on passenger side of vehicle. John
near the firewall on the passenger side
I have a 2003 Grand Prix GT and the AC recharge port is right behind the motor on the firewall. Look for the silver pipes coming out of the firewall right near the middle. You will see the recharge port on one of the pipes there.
The 1994 Mercedes-Benz low side port can be found on the top of the air conditioner compressor. The low side port will be labeled as the low pressure port.
The low pressure ac port is on the passenger side of the vehicle. It is close to the firewall mounted on the low side aluminum line.
The 1994 Buick Century air conditioning low side port can be found on top of the air conditioning compressor. The low side port will be labeled as the low pressure port.
The low side AC port on a 1994 Buick Skylark is on the passenger side of the engine compartment. It is near the front of the oil pan.