Where is the low side a/c port on 2001 lincoln ls

Todd, Low side A/C port, Check the attached links,instruction and guides, Good luck
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2000 Lincoln LS AC Low pressure port Location
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It' is on the compressor

Located on the accumulator, passenger side, large silver cylinder just in front of the firewall. The port is on the side near the top of the cylinder..

on back of air comp.

There should be two lines/hoses that come from the compressor. If you can locate these lines, the low pressure side is the larger diameter line or hose. The high pressure side is the smaller diameter line/hose. The re-charge goes into the larger, low pressure side.

The one charging port is at the front of the engine compartment, look around the top right side of the radiator. The other one is at the back of the AC compressor, and can be found from underneath by removing the small splash shield in the front of the drivers side wheelwell.

The Low side Connector port is located on the A/C compressor itself. This is on the bottom of driver's side of engine. You must jack up car and remove access panel behind aluminum wishbone of a arm.

2002 is what I have. should be similar

Service Gauge Port Valves
The high-pressure service gauge port valve is located on the A/C receiver drier manifold and tube assembly.
The low pressure service gauge port valve is located on the manifold of the A/C compressor manifold and tube assembly at the A/C compressor.

Item Part Number Description 1 19860 A/C evaporator core 2 19849 Thermostatic expansion valve 3 19A834 Manifold and tube assembly—thermostatic expansion valve 4 19D850 Manifold and tube assembly—A/C compressor 5 19E762 A/C charge port valve (low side) 6 19E762 A/C pressure relief valve 7 19703 A/C compressor 8 19D594 A/C pressure transducer 9 19712 A/C condenser core 10 19D701 A/C charge port valve (high side) 11 19N585 Manifold and tube assembly—receiver drier 12 19959 Receiver drier 13 19C734 Sensor—evaporator air discharge temperature

The lincoln better idea engineers put the low side freon port in a peculiar place.. You will find the low pressure port near the compressor under the car on the driver's side. You will need to put your car on a lift to get to it. Once you raise your vehicle, take the plastic shields off and you will find the compressor...yup...it's a tight spot.
Hope i was able to answer your question...be safe.

it is the one that is blue in color and has an L on it for low pressure. The vapor line is also called the suction line. If your confused, then choose the larger of the two lines near the accumulator.