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Unread 08-13-2013, 07:38 PM   #1
tjlover03
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2000 TJ Wrangler 
 
Join Date: Aug 2006
Location: knoxville tn
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Tj Swapping a 4.0 from an 05' Tj into a 2000 Tj

I just swapped in a 4.0 out of an 05 Tj into my 2000 Sahara. Now the only question I have is what is best option for different wiring harness and years... Should I cut and splice the two together or is there a trick or any advise would be great. Basically if I had the 05 pin out and full wiring diagrams I think I could easily cut and splice as needed. I searched and could find no solid info on the wiring difference or if anyone else has documented the swap! Any help would be awesome... Even if it is wiring diagrams for the 05 Tj!

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Unread 08-14-2013, 09:18 AM   #2
tjlover03
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Any help guys?
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Unread 08-15-2013, 12:10 AM   #3
19Mike95
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Do you have the harness for the 05 motor? If so I've always been informed on using the harness that came off the motor your using
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Unread 08-16-2013, 08:34 AM   #4
jdarg
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05-06 are kind of oddball years for engine management because they are the only two years which used the NKG engine management system.

97-04 models used the Chrysler JTEC setup.

I'm going to go out on a limb and say it will probably be easier to use the 2000 sensors/harness/ECU if it isn't CAN bus like the 05-06. Otherwise you are going to have a lot of little wiring issues to deal with, some of which might not be readily fixable. That said the 05-06 4.0 makes slightly better #'s which some folks attribute to the more advanced NKG computer, all other mechanical parts being identical to an '04 except the oil pump drive, who's sensor is specific to the NKG vs. JTEC previous.
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Unread 09-24-2013, 10:07 AM   #5
tjlover03
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Would it be alright to run both computers?
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Unread 09-25-2013, 07:14 AM   #6
thantos858
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Quote:
Originally Posted by tjlover03 View Post
Would it be alright to run both computers?
As far as I know you can't run 2 controlling computers because they would fight each other. If you can rewrite the code then you probably code do it.

Like suggested before use the 05 harness you should only need to locate the wires for lights and a few other parts the rest should be very similar to whats in there. I would also use that computer since I don't think there's a big change between the years besides engine control.
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Unread 09-25-2013, 02:20 PM   #7
LaddieHanus
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1997 TJ Wrangler 
 
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The 2005 computer will not talk to the 2000 instrument panel.
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Unread 11-13-2013, 08:20 AM   #8
rinking
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2000 TJ Wrangler 
 
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Im kinda in the same boat. I have a 2000 Wrangler with a hole in the block. Trying to figure out what year or models I can use for easy swap. Looking at Cherokee motors also.
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