jamcomanche Posted April 6, 2022 Share Posted April 6, 2022 My AC compressor stopped kicking on a week or so ago. I started troubleshooting by replacing the two relays under the hood, but it still won't kick on. I have service equipment to check the pressure, but my truck is missing service ports. I cannot find the high/low ports you see on retro-fits. Either my truck is still running an old R12 compressor somehow, or the guy I bought the truck from didn't install the system properly. I see one compression fitting on the back of the compressor that has threads on the inside of the opening. A second port has a cap screwed on. There are no other ports anywhere along so the lines. Can anybody tell me what I have here? I'm having trouble attaching photos so here's a link. https://i.imgur.com/TSywTOX.jpeg Link to comment Share on other sites More sharing options...
jamcomanche Posted April 6, 2022 Author Share Posted April 6, 2022 Finally got it to post Link to comment Share on other sites More sharing options...
ghetdjc320 Posted April 6, 2022 Share Posted April 6, 2022 The long port sticking out of the back of the compressor is your low side. Looks like maybe you're missing your high side adapter. Just connect the manifold gauge on the low side and see what's going on. The pressure switch may be the culprit. Link to comment Share on other sites More sharing options...
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