On my 04 Lincoln LS V8 the low side ac port is accessible under the car. You turn the front wheels all the way to the left. Jack up the car enough so you can get under it. There is a splash panel you will need to remove. with a 8mm socket and adjustable wrench. it's just the other side of the wheel well towards the front of the car. Once you remove it you will see the compressor and the low side port. It's a bit of a pain to get to but that's where it should be. If your adding freon in the hopes of curing a problem like mine. Where the ac blows hat air all the time. it could be the Dual heating control valve located under the high side port. from what I've read that is a common issue. the 10 amp fuse on mine blew and it's not working. Once I replace it I'll post the results.
where is the low side schrader vale located
i have been told it is on the a/c compressor itself,which is on the lower drivers side of the engine.
its under the car behind the drivers side front tire ,,air compresser
fuse box diagram for radio Lincoln ls 2000
On your 2000 Lincoln LS , 3.0 L V6 engine : ( the passenger side ) firewall 3 - 6 2 - 5 1 - 4 front of vehicle
Firing order on Lincoln ls 3.9 V8 driver side front to back 5678 passenger side front to back 1234
the low end pressure servvice port on a 3.9 litre 2001 Lincoln ls is on the ac compresser wich is located on the lower drivers side of the motor. easiest access is to take the drivers side tire off under the a arm.
I had an additive put in my Lincoln ls. I bought the adapter needed to add freon. It was located on driver side in front of tire.
The low side is the smaller of the two ports and usually has a green cap over it.
On a 2000 Lincoln LS : In the FRONT power distribution box ( which is " live " ) located in the engine compartment ( on the passenger side of the engine compartment ) ( relay # 14 is for the PCM power )
2000 ls
It's located on the A/C compressor.