Limeyjeeper Posted March 22, 2020 Share Posted March 22, 2020 So part of the LS build involves trying to get the Jeep AC harness to play nice with the LS harness. The LS PCM controls the AC compressor through a High/Low pressure switch, so that part is easy. I just need some eyes on the mod's to the harness I need to do to bypass the AC thermistor and the factory low pressure switch. I think I have got it right. I still need the pin 27 input working as that now goes to the LS AC Request pin. I also need to keep pin 34 which is the goes to the AC clutch relay trigger on the LS PCM. Just wanted to get some other sets of eyes on this. Did I get this right? I don't want to burn up the LS PCM by accident due to dumb wiring by me. 91 Jeep Ac wiring changes. Black lines are the changes LS Wiring Pin 27 and 34 are the Jeep PCM pin equivalents Link to comment Share on other sites More sharing options...
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