The low pressure port for your air conditioning system is on the top of the air conditioning system accumulator ( can) It is on the passenger side of the engine, not too far from your heater/air conditioning electric fan motor. It has a plastic dust cap on top of the valve. If the vehicle is a 2003 Ford Explorer XLT(5-door) with 4.0L V6 engine, the A/C accumulator (can) is located near the radiator just in front of the air cleaner housing. The low-side port is covered by a black plastic dust cap. Unscrew the cap to remove it.
On a 2003 Ford Explorer : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
The 2003 Ford Explorer has a V6 engine.
The 2003 Ford Explorer has 12 valves.
The 2003 Ford Explorer has a 5-speed automatic.
The 2003 Ford Explorer's turning circle is 36.7 ft..
The 2003 Ford Explorer is 15 ft. 9.5 in. (189.5 in.) long.
The 2003 Ford Explorer has a 23.6 degrees angle of departure.
The 2003 Ford Explorer has a 31 degrees angle of approach.
The 2003 Ford Explorer has single overhead cam (SOHC).
The height of the 2003 Ford Explorer is 5 ft. 11.9 in. (71.9 in.).
How to remove fan clutch on 2003 ford explorer
The 2003 Ford Explorer has a drag coefficient of .41 Cd.