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Unread 12-11-2011, 09:43 AM   #31
1992 renagade
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youngjeeper11 this guy put the whole XJ dash in a YJ but then the thread just died. Maybe worth checking out? http://www.jeepforum.com/forum/f12/8...16/index6.html

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Unread 12-11-2011, 10:32 AM   #32
ROWA
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youngerjeep11,
I scanned some of the wiring diagrams from the YJ and XJ hope this helps.
xj-ac-heater-wiring-diagram-1.jpg

xj-ac-heater-wiring-diagram-2.jpg

yj-ac-heater-wiring-diagram-1.jpg

xj-vacuum-schematic.jpg

yj-ac-heater-wiring-diagram-2.jpg
Did you check if the penetration for the heater and AC connections, interfere with the battery tray?
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Unread 12-11-2011, 06:29 PM   #33
youngjeeper11
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Wow, thanks for the help guys!! Seriously, I was not expecting so many great diagrams!

My printer at home is dead, so I am going to print all this stuff out at work, and hopefully sort some things out tomorrow night.

I think the wiring for the AC between a YJ and XJ is similar enought that it should not be too bad.

From my eyeballing and quick measurements the a/c and heater lines should clear to the inside of the battery tray.

Still waiting for my saw-z-all to come so I can actually start doing some surgery....

still going to try to post some pics if I get a chance tonight....
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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

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Unread 12-11-2011, 07:06 PM   #34
youngjeeper11
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heres some pics of the water valve and vacuum acummulator tank...thing.

I highly recommend using these from a newer cherokee, the vacuum lines are more simplified and the water valve it better quality and more simplified.

The accum tank has 1 larger tube that runs right to the vacuum source, has all the check valves, and tees off for the vacuum needed for the whole AC system.

I am going to try to find time to make an AutoCAD drawing of the system.
water-valve-2.jpg

accum-tank.jpg

water-valve.jpg

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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!!
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Unread 12-11-2011, 07:08 PM   #35
youngjeeper11
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sorry. heres bigger pics
accum-tank.jpg   water-valve-2.jpg   water-valve.jpg  
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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!!
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Unread 12-11-2011, 07:09 PM   #36
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man, I need to charge my digital camera, cell phone pics suck haha
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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!!
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Unread 12-11-2011, 07:51 PM   #37
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Hey I used the same reserve tank from the xj when I did my engine swap because I also used the Cruise Control in the YJ. It nice to have CC on the turn signal stock.
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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Unread 12-12-2011, 04:52 AM   #38
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Hey I used the same reserve tank from the xj when I did my engine swap because I also used the Cruise Control in the YJ. It nice to have CC on the turn signal stock.
I was thinking about doing the same thing later down the road...
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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!!
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Unread 12-12-2011, 08:18 AM   #39
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Originally Posted by youngjeeper11 View Post
I was thinking about doing the same thing later down the road...
If you are doing this with the diesel engine is going to be harder than I had. The CC is controlled by the ECM. Now if you where to install a separate controller that would be a different thing all together.
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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im just cheap, and cheap makes you creative.
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Unread 12-12-2011, 08:22 AM   #40
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If you are doing this with the diesel engine is going to be harder than I had. The CC is controlled by the ECM. Now if you where to install a separate controller that would be a different thing all together.
Yea, I was wondering if I could get everything from an XJ wired up and fool the ECM with the correct speed sensor...... definitely a different project haha.
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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!!
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Unread 12-12-2011, 09:13 AM   #41
Que89YJ
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The ecu controlls the electric rad fan and will change the idle to compensate when loaded. I will be intersted to see if you get it working.
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Unread 12-12-2011, 09:59 AM   #42
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The ecu controlls the electric rad fan and will change the idle to compensate when loaded. I will be intersted to see if you get it working.
Well, I am not really worried about idle change, I dont think the load of the AC compressor is going to load a 4BT enough to where it is very noticable, and there is really no way to electronically control the idle on a 4BT, well, I'm sure it is possible, but no point really...

I am probably going to hardwire an additional electric fan. Not sure where I am going to put the condenser either, my intercooler is kinda in the way, So I may have to mount it elsewhere in the engine compartment with an additonal fan either way.

I do not think it will be difficult to find a signal wire to turn the fan on when the AC is on.....
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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!!
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Unread 12-12-2011, 10:13 AM   #43
Que89YJ
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I didn't notice the 5.7! It's actually not so much the compressor as the fan. That electric fan is a huge in rush draw as much as 80 amps and continuous between 20-40 amps. The ecu was compensating for the load. In your case it's totally different. It will still load down but with as much HP as you have I don't think it matters! Like I said, if you need any help electrically I will help out. It looks like a good one to do as a writeup.
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Unread 12-12-2011, 11:02 AM   #44
youngjeeper11
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The Chevy 350 5.7 was my old Jeep.

I now have a different one that I put a 4BT into. I still need to find an A/C compressor from a Dodge ram cummins for a reasonable price.

an A/C fan will really draw that much load!?!? I run a taurus electric cooling fan right now that is just thermostatically controlled, and I would think the engine cooling fan would draw a lot more.

Hmm, I wonder if it would be benficial to run some type of independent thermostatically controlled deal for the A/C, but I figured it would be best to just have the A/C fan run constantly if the A/C is turned on.

Looks like I need to do some additional research. I would obviously not just run a wire from the ac controls to the fan, I would definitely have a relay of some type in there, which is another reason I want to utilize the YJ power distribution center.

Do you think I will be ok if I just run it through a relay to be on when the A/C is on? I am a mechanical engineer, not electrical haha. I am only a novice with wiring.

I guess my biggest concern would be my alternator, and how well it would keep up on a hot day running an engine cooling fan and A/C fan, and lights, ect. Not sure of the ratings on my alternator, but I would assume it would be fairly powerful being on a 4BT....

I think a write up will be in order once I get it all figured out. I'll just try to remember to keep things documented.
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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!!
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Unread 12-12-2011, 11:29 AM   #45
Que89YJ
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If you have a Taurus fan then it is just a matter of wiring then to make the taurus fan work for you. The controller I have has an input for the AC to drive the taurus fan mod. I am using the Hayden and it has the setup for it to override the thermocoupler when turning on the ac.
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