Fabrication & builders section. All fabrication posts go here.
XJ/MJ/ZJ/WJ Only projects go here. Questions belong in modified tech.

Custom Minimal Wire Harness

Old 10-29-2016, 08:17 PM
  #1  
Senior Member
Thread Starter
 
blankdeluxe's Avatar
 
Join Date: Oct 2010
Location: Pagosa Springs, Colorado
Posts: 562
Year: 88-ish
Model: Cherokee
Engine: 4.0 I6
Default Custom Minimal Wire Harness

So I decided to go the diy route. I built a custom harness with just the bare bones items to run and nothing else. I thought about a painless kit til I saw the price and realized I could do that myself for free. I took the harness out of my wifes MJ since its getting swapped anyway. I'm currently running a 90 MJ manual ECU with all the 88 electronics. This is all thats required to make these engines run
CPS
TPS
Cam sensor(sync sensor)
MAP
Coil
Injectors
ASD relay (Latch)
Fuel Pump Relay
IAC (Air Stepper Motor)
CTS
IAT
Knock sensor (not critical)
o2 sensor (not critical)

Here are the resources I used along with a FSM to build this harness.

http://www.pirate4x4.com/forum/jeep-...e-harness.html

http://jeep.zerok.ru/index.php?page=124 (scroll down)

It took me about 6 hours to tear down and I have about 10 hours on rebuild and install. I have a small fuel leak on my fuel cell but it runs again. I'm in the process building the inside harness now and getting everything tied together properly but it should be up and running by next weekend. Also, don't forget that I have also bypassed the TCU for the AW4 so if you will need to eliminate that harness and work out switching gears if you have an auto. If anyone wants to tackle this project feel free to PM me. Its really not as bad as it seems. I ran out of light tonight but I'll have the engine bay done tomorrow. Interior cleanup comes next.



The pile I started with




New harness installed prior to triming




Driver side Trimmed and wired.




What was deleted from the factory harness




Harness done.




New battery location and radiator bottle.
blankdeluxe is offline  
Old 10-31-2016, 02:41 PM
  #2  
CF Veteran
 
Big David's Avatar
 
Join Date: Jun 2011
Location: Murrayville,Ga.
Posts: 2,635
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Wow, that's a lot of excess wiring. Looks naked.
Big David is offline  
Old 10-31-2016, 04:03 PM
  #3  
CF Veteran
 
Batman33165's Avatar
 
Join Date: Apr 2013
Location: Rowlett, Texas
Posts: 1,132
Year: 1988
Model: Cherokee
Engine: 4.0 Inline 6
Default

Wow, thats crazy... I thought i took alot of wiring in the cab, but to see the same can be done in the engine bay really has me thinking
Batman33165 is offline  
Old 11-01-2016, 04:08 AM
  #4  
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,606
Year: 1990
Model: Cherokee
Engine: 4.0
Default

Why did you move the battery to the overflow bottle location?
bad_idea is offline  
Old 11-01-2016, 09:46 AM
  #5  
Senior Member
 
Join Date: Mar 2016
Location: AV Kalifornia
Posts: 583
Year: 1996
Model: Grand Cherokee
Engine: 4.0
Default

Originally Posted by bad_idea View Post
Why did you move the battery to the overflow bottle location?
mass centralization! improves handling in turns and while whipping it in the air. just kidding of course....
jon-d is offline  
Old 11-01-2016, 02:31 PM
  #6  
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,606
Year: 1990
Model: Cherokee
Engine: 4.0
Default

I'm fairly new to off roading, coming from muscle cars. Had me going for a second there. Ha. My 79 Camaro has the battery relocated to the trunk over the pass rear tire to help with traction at take off and better weight transfer to rear axle.
bad_idea is offline  
Old 11-07-2016, 05:36 PM
  #7  
Senior Member
Thread Starter
 
blankdeluxe's Avatar
 
Join Date: Oct 2010
Location: Pagosa Springs, Colorado
Posts: 562
Year: 88-ish
Model: Cherokee
Engine: 4.0 I6
Default

Battery was moved cause it has been riding on the coil since I narrowed the front end and I finally decided that its time to give it a home. The coolant bottle moved because it obviously doesn't fit in its old home and by putting it closer to the front I can minimize coolant lines as well.

To finish this, I used blue sea systems fuse panels and regular 5 pin relays to get everything cleaned up on the inside. The only problem I had on startup was the fuel pump wasn't starting from the ecu signal so I ended up hardwiring it as well. Otherwise, she runs great. This runs 100 times better than my factory setup ever did. Quick to start and simple to diagnose if I have any issues. And now that everything is simplified it should be quite easy to add a turbo like I have been planning to give it a little more get up and go. I'm looking at a 50 trim T3 .48 ar turbine which should be getting me into boost around 1400 which should be just about right in the rocks.


















blankdeluxe is offline  
Old 12-12-2016, 08:00 PM
  #8  
Newbie
 
Dirty Offio's Avatar
 
Join Date: Nov 2016
Location: Ferndale, WA
Posts: 15
Year: 1985, 1996, 2000
Model: Cherokee
Engine: 2.5, 4.0, 4.0
Default

BlankDeluxe,

Wow, I did not know you could cut that much crap out of the factory harness! Mine is going it get bigger trim than I thought it would. Been doing this for years on 70's and 80's pickups to clean them up.

I have 2 questions for you, if you don't mind. If you posted about it, I couldn't find it, but I was going a little crosseyed looking thru your posts! lol

1. On your air pipe, why did you run passenger side before swinging back to driver side? Just to pick up the PCV?

2. Where does your air inlet go once it enters the firewall? Just into the cowling or do you have a snorkel?

Again, I dig the [email protected] outta your buggy!

Thanks man!

Offio
Dirty Offio is offline  
Old 12-19-2016, 03:42 PM
  #9  
Someone stole my badge!
 
Basslicks's Avatar
 
Join Date: Mar 2011
Location: Ocala, FL
Posts: 11,137
Year: 1992
Engine: 4.0 HO
Default

Wow man! This sure has come a long way since "I got bored, so I started bobbing my front end"

Good stuff!
Basslicks is offline  
Old 01-13-2017, 02:40 PM
  #10  
Senior Member
Thread Starter
 
blankdeluxe's Avatar
 
Join Date: Oct 2010
Location: Pagosa Springs, Colorado
Posts: 562
Year: 88-ish
Model: Cherokee
Engine: 4.0 I6
Default

Originally Posted by Dirty Offio View Post
Again, I dig the [email protected] outta your buggy!
Offio
Thanks Dirty Offio, its getting there.

1. The intake is made by spectre and the reason for the weird shape is it has to catch the PCV valve but it also has my airfilter in it so it needs enough length to fit that as well.

2. It just opens into the cowling. on the Renix xjs the driver side cowl is empty and works great as an intake to get cooler air and to get it up higher and out of the way. I used to have a snorkel on the jeep but when I narrowed the front end it made it pretty much impossible to get it on so this was the next best option. A turbo is in my somewhat near future so the whole intake system will have to get redesigned again at that point.


Originally Posted by Basslicks View Post
Wow man! This sure has come a long way since "I got bored, so I started bobbing my front end"

Good stuff!
Thank you sir. Just wait. The next few things on the to do list are pretty big ones. Its going to be a whole different animal in the next couple years. Exciting stuff is coming!
blankdeluxe is offline  
Old 01-13-2017, 04:51 PM
  #11  
Member
 
Pelagius's Avatar
 
Join Date: Jan 2015
Location: Glendale, Az
Posts: 162
Year: 1998
Model: Cherokee
Engine: 4.0 Inline 6 Cylinder
Default

Wow! that is A LOT of trimming! Due to the wiring in the XJ being alright at best, is there any benefit to creating a beefier wiring system that replicates the factory one?
Pelagius is offline  
Old 01-13-2017, 08:45 PM
  #12  
Newbie
 
Dirty Offio's Avatar
 
Join Date: Nov 2016
Location: Ferndale, WA
Posts: 15
Year: 1985, 1996, 2000
Model: Cherokee
Engine: 2.5, 4.0, 4.0
Default

BlankDeluxe,

Rock on man!

Thanks!

Offio
Dirty Offio is offline  
Old 01-15-2017, 02:03 PM
  #13  
Someone stole my badge!
 
Basslicks's Avatar
 
Join Date: Mar 2011
Location: Ocala, FL
Posts: 11,137
Year: 1992
Engine: 4.0 HO
Default

Originally Posted by blankdeluxe View Post
Thank you sir. Just wait. The next few things on the to do list are pretty big ones. Its going to be a whole different animal in the next couple years. Exciting stuff is coming!
Good to hear man, keep it up.
Basslicks is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.