inaJeep

This is the most confusing part of this project... there are SO many wires in the stock motor wiring harness that came with the motor/transmission setup... it's CRAZY!  First things first... if you're doing this project, do yourself a favor and at least checkout one of the guys who has done more work on documenting this stuff that pretty much anyone, at least from what I've found... his Name is Brendan Patten and he has a website at http://www.lt1swap.com/ .   Be sure to check it out!!!! I couldn't do this part of the project without his help.  As a matter of fact, I actually sent him my PCM and had him re-flash it for me for all of the specs I have for my Jeep and with all of that, he only charged like $75 which included shipping it back to me.  Sweet!

So, instead of trying to figure out the wires in the garage, I took the whole harness down to the office so I could work on the floor with it and take my time, and have good light, and plenty of reference computers nearby for looking up the information on Brendans site.  Here's what I'm working with... and the way it looks on my floor right now (8-10-11)

All I know is, this project would be a LOT more difficult if I didn't have something to go from, and Brendan has done an amazing job with documenting all of the stuff on these motors, I can't tip my hat to him enough!

I got a few little extras, miscellaneous parts that will be needed to do this, based on input from Brendan... 

Ok, so the next step was to tear the split-loom off the harness, and then tear all of the electrical tape off of it to see what I am up against, and what I have to work with.

So, I know that I'm going to be pulling wires out of this, because I had my PCM re-flashed by Brendan to remove all of the EGR, which means less O2 sensors to deal with, among other things.   First thing, once I tore off all of the loom and tape, I had to get the clips and connectors out of the PCM connectors so I could pull wires out of it.  It's pretty easy, but be gentle because the red and blue clips are a little on the brittle side, especially for older vehicles I would imagine.

The amount of wires you are able to strip out of the harness depends on how much of the original system you're needing/wanting to keep.  I decided before even getting into this that I wanted to convert the acceleration system from drive-by-wire to drive-by-cable.  I like mechanical cables from the gas pedal to the throttle body...so that's what I decided to do... and in doing that, I first had to find that DBC throttle body.  I got a good deal on an LS1 mechanical throttle body from a 1998 camaro that's in great shape...so I put that on my intake and noticed immediately after getting into the wiring harness that there are no wires in the current system, and that I'm going to have to "ADD" wires and connectors to this system in order to get this to work with the PCM.  I found the IAC connector and the TPS connector on ebay, shipped for $25 bucks...done.   I'll show pics of the finished product when I have them, but I have those connectors on the way, and I'll be able to splice them with some previously used wires into the harness so that the PCM knows the position of the throttle, and so that it knows and can control the idle air circuit, which is essentially a controlled vacuum leak designed to allow the computer the ability to control this "leak" and thus, keep the motor running, even when the butterfly valve on the throttle body is completely closed.  

Here are the connectors you need:

more coming... once I get the connectors and splice them into the harness, I'll post pics of that too so you can see everything.   I'm waiting on these connectors as of 8-22-11.  I will begin re-taping and looming the harness sometime in the evening this week.  Pictures will be coming.