Where do you add freon to the 1982 Toyota pickup?

To add Freon to a 1982 Toyota pickup, locate the low-pressure service port on the air conditioning system. This port is typically found on the larger diameter aluminum line that runs from the compressor to the evaporator. Remove the cap from the port, attach the refrigerant recharge hose, and follow the instructions on the refrigerant can to add Freon. Always ensure the engine is running and the A/C is set to the maximum cool setting while adding Freon.