Follow the suction side hose (larger one) from the accumulator to the evaporator and its very close to the firewall......
On the low pressure side. A charging hose will only fir on the low pressure side of the AC system.
Freon is added through the low side ac pressure port. Connect the hose from the gauge and Freon and allow Freon to fill the system until the gauge shows full. The engine and ac need to be running during this process. Make sure to follow all directions on the Freon can.
The low pressure port on a 1996 Oldsmobile Cutlass is between the compressor and the firewall. It is on the larger hose attached to the compressor.
Refrigerant goes in the lower pressure hose on a vehicle. The lower pressure hose can be found on the right side of the engine.
You don't add Freon as it has R134a not Freon. You add it to the low pressure side which is the larger hose.
The low side ac port on a 1997 Pontiac Firebird should be located on a hose on the passenger side. The hose is close to the radiator.
Low pressure side-- larger hose from compressor
Low pressure line\ Larger hose from the compressor
Low pressure line from the compressor (Larger hose)
Low pressure port larger hose from the air comprssor
buy an a/c refill kit (freon and a filler hose) at auto parts store. follow directions on can. if you can read, you can do it.
Quick release fitting located on the low pressure side (Larger hose from compressor)