were is the port for freon on a 2002 lincoln ls

l do not know why but car manufacturers put these in different places. find the large ac line.and just follow it you will find a fitting along there somewhere..there is a thin line and a large line.do not use the one with the thin line.this is your hi pressure side.you want the low pressure (suction) side.it should have a blue cap on it.the hi pressure side should have a red cap on it.

Hope this helps.