How do you add freon to Mazda b2300 truck?

To add Freon to a Mazda B2300 truck, first ensure the engine is off and the AC system is off. Locate the low-pressure service port, typically found on the larger diameter AC line; it usually has a blue or black cap. Connect the refrigerant canister with a gauge to the low-pressure port and start the engine while turning the AC to the maximum setting. Monitor the pressure on the gauge and add refrigerant as needed, following the manufacturer's recommended specifications. Always wear safety gear and consider consulting a professional if you're unsure.