alright heres where I am at after studying diagrams for like 6 hours
I ended up buying diagrams from alldatadiy.com, they are actually pretty decent.
The YJ and XJ systems are wired a little different. There is one difference I have not quite figured out. The XJ system has 1 extra wire that is supposed to go to one side of the low pressure switch, and it is totally absent in the YJ system, so I may need to run an extra wire. Also, the connector for the blower motor is under the hood in the engine bay in the XJ, and under the dash in the YJ, So I am going to have to run an extra wire for power to the motor out to the enigne bay as well.
in the pics you can see how there is 1 plug that connects the whole XJ HVAC wiring to the main harness, and the YJ system has 1 plug that connects just the AC system to the main harness, not the heating system.
So basically I cut the YJ plug off, and soldered the XJ connector on in its place after I figured out what wires were similar.
My only mystery right now is there there was a red and black wire on the YJ connector that was some how for a cigar lighter, is there a cigar lighter mounted on the YJ AC system?
In reality, it is only 5 wires to get it to work.
Also, during my research, I found that the blower motor resistor in the XJ system is known for going bad, so I may replace that off the bat. I need to flush the heater core as well.
I wish I could have mounted the unit this weekend, but my saw-z-all I ordered is about a week late..... USPS sucks....
Jeep 1:Used to have a 93 YJ 2.5l- 3.5" Black Diamond, Chevy TBI 5.7l V8, SM 465 4 speed, 8.8 rear( 4.10, L/S), rhinoline, Mile Marker 9000, NP 231, Had to sell it due to college
Jeep 2: 89/91 YJ, 4BT Cummins, NV4500, NP 231, Old Man Emu 2.5" suspension lift, 1" body lift.....Runs and drives, but very much a project
Interned at Novak Conversions 2 summers ago
Ask me about my 4BT Cummins Motor Mounts!!