Can some one tell me where the low pressure service plug is located on a 1996 LS400. I see the high pressure plug but not the low side. Where can it be, probably under the car some where??

 

don't recall specifically, but if you follow the a/c line that comes out of the firewall on the passenger side into the engine compartment, you will find it along that line before it makes it back to the compressor

 

on my 93 its on the passenger side header area.