Where do you put freon in a 94 grand marquis?

To add Freon to a 1994 Grand Marquis, locate the low-pressure service port on the air conditioning system, which is typically found near the accumulator or the compressor. Remove the cap from the port and attach the refrigerant can with a gauge to ensure proper filling. Follow the instructions on the refrigerant can for the correct procedure and amount to add. Always check for leaks and ensure the A/C system is off before starting the process.