Where is the low side port on a 78 jeep wagoneer?

On a 1978 Jeep Wagoneer, the low side port for the air conditioning system is typically located on the accumulator or the suction line near the firewall. It is usually a smaller fitting that connects to the larger refrigerant line. To identify it easily, look for a service port with a plastic cap that is often blue or has a label indicating it's for low pressure. Always ensure the system is not under pressure before attempting to access the port.