'89 to '91 wiring - JeepForum.com
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post #1 of 20 Old 09-14-2017, 03:17 PM Thread Starter
cl700
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'89 to '91 wiring

So I have an '89 jeep Cherokee Laredo. Recently I bought a '91 Laredo for parts. The wiring in the '89 has started to take a crap so I wanted to replace it with the wiring from the '91. How hard of a swap is this? What tips do you have for me before starting?


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post #2 of 20 Old 09-15-2017, 05:50 AM
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Don't do it. Really alot different.

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post #3 of 20 Old 10-10-2017, 08:42 PM Thread Starter
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I actually went ahead with it. I have everything swapped in. Only thing now is I donít have spark


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post #4 of 20 Old 10-10-2017, 09:56 PM
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Quote:
Originally Posted by cruiser54 View Post
Don't do it. Really alot different.
Quote:
Originally Posted by cl700 View Post
I actually went ahead with it. I have everything swapped in. Only thing now is I donít have spark
You asked, and got an answer from one of the top (if not the very top) Renix guru & went ahead anyway?

Never, but never doubt cruiser54!

Working with cars is a little like a really awesome date: you start out expecting this to be something simple and straightforward; four hours later you're laying under her, panting and cursing, and things are a lot more complicated than you thought.

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post #5 of 20 Old 10-10-2017, 10:09 PM
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Did you swap ecm and all sensors? If not, swap wires back and then replace the wires that were originally on the jeep with new wires where needed.
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post #6 of 20 Old 10-12-2017, 03:40 AM Thread Starter
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I swapped all sensors and things that did not allow the new harness to work with the old. And I know I asked a question and then went ahead with it anyway, however at the time I thought it to be worthy to do. Now I see I should have just replaced wires where I could in the truck


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post #7 of 20 Old 10-12-2017, 06:28 AM
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WHAT ABOUT THE FLYWHEEL/FLEXPLATE????????

If you still have the 89 flexplate in it, it won't work with the HO CPS and an HO flywheel won't work with a Renix CPS.

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post #8 of 20 Old 10-12-2017, 11:42 AM Thread Starter
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No I didnít swap the flex plate out. The motor has been rebuilt about 1,000 miles ago if that even. And I meantioned to them about this swap before so I could go to the non renix intake and they said everything should work just fine


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post #9 of 20 Old 10-12-2017, 11:45 AM
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Quote:
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No I didn’t swap the flex plate out. The motor has been rebuilt about 1,000 miles ago if that even. And I meantioned to them about this swap before so I could go to the non renix intake and they said everything should work just fine

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post #10 of 20 Old 10-13-2017, 06:39 AM
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Who is "they"?

Better have a peek at that flexplate.

If it has little rectangles in it all the way around, it's a Renix flexplate.

If it only has a few every 120 degrees, it's an HO.

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post #11 of 20 Old 10-15-2017, 12:21 PM Thread Starter
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Alright, well Iíve got spark now but the thing still wonít fire. So now Iím lost


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post #12 of 20 Old 10-15-2017, 12:44 PM
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Alright, well Iíve got spark now but the thing still wonít fire. So now Iím lost


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How did you get this spark?

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post #13 of 20 Old 10-15-2017, 04:47 PM Thread Starter
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Well I pulled the crank shaft positioning sensor and cleaned it and re hooked it up


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post #14 of 20 Old 10-15-2017, 10:02 PM
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Well I pulled the crank shaft positioning sensor and cleaned it and re hooked it up


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Still don't know which flexplate you have......

Hate to say I told you so, but I did. And you ignored my advice.

Now, you post things that don't answer our questions and plea for help. I think I need to unsubscribe from this hopeless thread.

I feel like I'm talking to a frickin brick wall. Cheers!!!
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post #15 of 20 Old 10-15-2017, 11:44 PM
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Quote:
Originally Posted by cl700 View Post
I swapped all sensors and things that did not allow the new harness to work with the old. And I know I asked a question and then went ahead with it anyway, however at the time I thought it to be worthy to do. Now I see I should have just replaced wires where I could in the truck


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>>Bingo!<<

If you still have your old wiring harness, start putting it back. Otherwise, pull the engine & swap out your flexplate. (and hope that's the only problem)

SMH

Working with cars is a little like a really awesome date: you start out expecting this to be something simple and straightforward; four hours later you're laying under her, panting and cursing, and things are a lot more complicated than you thought.

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