Kedosp Posted yesterday at 02:39 AM Share Posted yesterday at 02:39 AM Hello everyone, I have an 88 MJ with original renix 4.0 that never had AC. I’ve added all the ac parts under the hood, swapped in an AC hvac box and replaced the dash wiring and controller. I can’t find a diagram for how to build a harness to hook to the 4 pin dealer AC connector. I know it includes a relay, 2 wires for the pressure switch and one for the compressor clutch. Can anyone provide a diagram, or close up pics of the wiring? I found this pic but can’t see the details I need. Link to comment Share on other sites More sharing options...
fiatslug87 Posted yesterday at 02:45 AM Share Posted yesterday at 02:45 AM Try these https://comancheclub.com/topic/12083-electrical-manual/#comment-117394 https://comancheclub.com/topic/11875-renix-factory-service-manual/#comment-115082 Link to comment Share on other sites More sharing options...
Kedosp Posted yesterday at 02:52 AM Author Share Posted yesterday at 02:52 AM Thanks fiatslug87! I should have mentioned I downloaded the electrical FSM and reviewed it but it doesn’t seem to include the dealer AC diagram, only the below diagram for the wires on the jeep side of the 4 pin connector. Link to comment Share on other sites More sharing options...
eaglescout526 Posted yesterday at 03:00 AM Share Posted yesterday at 03:00 AM Oh look! My picture from my 2.5L AC post. Ok so that harness has an in-line circuit breaker and a relay that can be seen. I will go look at my electrical books and see what I can find for ya. Link to comment Share on other sites More sharing options...
Kedosp Posted yesterday at 03:08 AM Author Share Posted yesterday at 03:08 AM Eaglescout526 - yes, you had the only picture I could find anywhere of that harness! Appears to be the same for the 2.5 and the 4.0 Link to comment Share on other sites More sharing options...
eaglescout526 Posted yesterday at 03:22 AM Share Posted yesterday at 03:22 AM I’m not entirely surprised. I got really lucky to find that as NOS. Without really tearing my harness out to figure it all out at the moment, I haven’t been lucky to find anything in relation to that harness anywhere. I’m gonna check my 86 manual and see if anything is there. But no luck in my 88 or 89 manual. Link to comment Share on other sites More sharing options...
Kedosp Posted yesterday at 03:27 AM Author Share Posted yesterday at 03:27 AM Assuming you still have that jeep, If you can take pics of the wires for the connectors and relay that would probably work Link to comment Share on other sites More sharing options...
eaglescout526 Posted yesterday at 03:42 AM Share Posted yesterday at 03:42 AM Of course!! That MJ is my baby! I’ll snap all the pics of the colors of the wires here in a bit. Link to comment Share on other sites More sharing options...
eaglescout526 Posted 23 hours ago Share Posted 23 hours ago Link to comment Share on other sites More sharing options...
Kedosp Posted 15 hours ago Author Share Posted 15 hours ago Thanks a ton for getting those pictures so quickly! I noticed there is a grey wire on one of the relay terminals. Can you tell where that ties into the 4 wires from the connector? You mentioned there is a circuit breaker on the harness. Is that the small component with white wires feeding it labeled 7Y02? That’s an odd looking circuit breaker, are you confident that’s what it is? Link to comment Share on other sites More sharing options...
eaglescout526 Posted 12 hours ago Share Posted 12 hours ago I believe the grey goes to the compressor. Yes that is the circuit breaker. It’s there in the event the in-line diode to the compressor we’re to fail. Link to comment Share on other sites More sharing options...
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