JonRedcorn

Here's a description from the manual of exactly how that switch kicks that compressor on.

4.3L XJ

Well, that is not quite in plain English. But if you take the wire from the back of the selector, which will be positive, then splice a fused switch into that, everything will work right. To find a ground, use an ohm meter set to resistance. Touch one probe to the wire in question and another to a good ground. If you get current passing though it is a ground. However don't mistake the wrong wire because if it operates something and it is good, it too will show current passing with more resistance

P.S. I have an 88 and 05 Crown Vicky

JonRedcorn

Gunna be a few days here till the weather gets better. Will update when I get back to work on it.

JonRedcorn

So just to update, It would appear I have everything now working but is it possible that it being so cold out the compressor just isn't going to turn on? I have my AUX fan turning on now when turning the AC on. I tracked down the low/high pressure switch circuit as the cause of that not working. The high pressure switch connector is messed up and the posts were shoved way down in the connector. I pulled them out and jumped the entire switch circuit, now I turn the AC on everything kicks on besides the compressor, it is like 45 degrees out though so I don't know if that's something that would cause it not to come on?

4.3L XJ

Good find. It should still come on. Many newer vehicles turn it on with the defrost to supply dry air to the windshield

JonRedcorn

LOL so umm... I had the compressor unplugged. Everything works perfectly now. Well like 95% I still have the sensors jumped, but the system works. I gotta fix that connector and test the switches but everything is working I am so happy lol. Bought this jeep with no AC and no heat and I fixed both of em!! Awesome. Thanks for all the help.

4.3L XJ

Congrats

djgrayxj

Note from DJ

NAPA AUTO has the Connector that you need.

Air Conditioning High Pressure Cut-Out Switch Connector

Part #: TEM 207491

JonRedcorn

Hey thanks for this man, much appreciated.