Where is the low pressure port on a 2003 ford f-150?

On a 2003 Ford F-150, the low-pressure port for the air conditioning system is located on the larger diameter A/C line, typically near the accumulator or the evaporator. It is usually situated on the passenger side of the engine bay, near the firewall. The port is typically capped with a plastic or metal cover and is labeled to differentiate it from the high-pressure port.