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Unread 07-15-2013, 01:27 PM   #1
longtro
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computer upgrade? (94-->96)

I have a 94 stocker. I want to add a scangauge or some thing similar.

so does a 96+computer just swap in? easy plug in swap or is there wiring hareness difference?

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Unread 07-15-2013, 02:05 PM   #2
79chiefs
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96+ is obd2 so i would say no they are different, 95- is obd1. Just MY thoughts
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Unread 07-15-2013, 11:24 PM   #3
RockRodHooligan
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A 96 is going to be the best Connor for parts if you want to switch to OBD2, just know that the 96 wiring has more in common with the 95, 94 is different than both.
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Unread 07-16-2013, 12:11 PM   #4
longtro
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Originally Posted by RockRodHooligan View Post
A 96 is going to be the best Connor for parts if you want to switch to OBD2,
... Yes. I was aware that ODB2 Was +96. I should have made that clear. I just wanted to know if the compter swap was a straight plug and play or not.
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Originally Posted by RockRodHooligan View Post
just know that the 96 wiring has more in common with the 95, 94 is different than both.
this is what I was curious about. so the 94 is different! is wiring the wiring diff 96+ or just a differnt pin block or Map(right word?)?

Thanks rot rod!
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Unread 07-16-2013, 12:17 PM   #5
longtro
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I forgot to mention it is an automatic.

I hope to either swap in a standard with in the year or over ride the controls and have the power to fully control all the shifting of my 4 speed auto.
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Unread 07-16-2013, 12:25 PM   #6
79chiefs
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Here is the answer. No. I did some research and you need a computer with the same part number, i GUARANTEE a 96 part number is different.
Edit--After more research i believe ANY computer 92-95 will fit. 91> is renix, and 96< is obd2.
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Unread 07-17-2013, 05:21 PM   #7
longtro
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Originally Posted by 79chiefs View Post
Here is the answer. No. I did some research and you need a computer with the same part number, i GUARANTEE a 96 part number is different.
Edit--After more research i believe ANY computer 92-95 will fit. 91> is renix, and 96< is obd2.
thank you I will have to just do some modifiacations to do the upgrade.
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Unread 07-17-2013, 08:26 PM   #8
KF4SQB
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The plugs that attach the wiring harness to the computer is different, if I'm not mistaken. I'm sure it could be done, but it would take some harness splicing.
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Unread 07-24-2013, 09:19 AM   #9
longtro
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Originally Posted by KF4SQB View Post
The plugs that attach the wiring harness to the computer is different, if I'm not mistaken. I'm sure it could be done, but it would take some harness splicing.
well I am intent on getting odb2 so I will muster up my courage and figure it out. I will start looking up the schematics
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Unread 07-25-2013, 11:15 AM   #10
KF4SQB
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I don't have anything for the '96, but here's the pinout for the '94 PCM connector.

pcm.pdf
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Unread 07-25-2013, 05:50 PM   #11
longtro
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Quote:
Originally Posted by KF4SQB View Post
I don't have anything for the '96, but here's the pinout for the '94 PCM connector.

Attachment 649924
Thanks! there is a 97 4.0l auto at the pull a part.... just ****ing ****ty driving for a couple of hours in the heat to go look to see if it is there.
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Unread 08-16-2013, 05:11 PM   #12
longtro
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have not gotten any forther with this. : /
and remembered that the Cherokee upgraded from distributors some where in the years I was hoping to get the computer.

from FOUR WHEELER net article:

....and in 1996, OBD2 (On Board Diagnostics 2) made its debut. Many hated it at the time, and still hate in now. OBD2 monitors and controls more aspects of the engine than the previous generation did, which can make transmission swaps and blowers harder to get right. On the one hand, OBD2 will let you get away with less power adding before throwing the dreaded CEL light. On the other hand, if something goes wrong, it is easier to plug in a scan tool to retrieve the code and replace the widget that went bad. If you like having more control of your XJ, stick with a '95 and earlier model.

There were up to three major wiring harness revisions in 1997. No matter who you talk to, everyone agrees that unless you are leaving it completely alone, you might want to avoid a '97. We've been in and out of most of these, and it's clear that it took Chrysler until late 1997 to figure out the wiring, make it neat, orderly, and uniform from one month to the next.

2000 is the upgrade to coil on plug ignition.

Last edited by longtro; 08-16-2013 at 06:03 PM..
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Unread 12-09-2013, 12:48 PM   #13
longtro
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Quote:
Originally Posted by KF4SQB View Post
I don't have anything for the '96, but here's the pinout for the '94 PCM connector.

Attachment 649924
hey there.. Thanks alot for this again!
is the 'signal ground' from the alt?
I am wondering if This is where my over charging problem lies.
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