Update time.... 4 connections to the battery:
#1 - Negative to frame
#2 - Negative to engine
#3 - Positive to power distribution box
#4 - Positive to starter
For numbers 1 and 3 I replaced the cable entirely with 4 gauge black/red cable with copper lugs soldered on both ends. Yes I had rework the connection to the power distribution box a little, but its a firm connection.
For numbers 2 and 4, I left the connections to the starter and engine block untouched. The battery ends of the cables, I replaced the old terminals with copper lugs. Was able to get enough slack after unbundling the entire main cable assembly.
All connections are solder.
During all of the cable and connection work, I had the battery out, as well as the battery tray. I work in a kind of a dim garage so at times I had a 12V shop light attached to my battery sitting on the floor and the light hanging from my hood. Well.... of course I neglected to turn it off on one of my runs back into the house to handle my 1 year old... and the battery drained completely. Read 3.4V when putting a voltmeter across the unloaded terminals.
I pressed on, getting all the cables and connections done using a flashlight. When I finished the cables, I reconnected the ground connection to the frame, reconnected the connector that I disco'd under the battery tray and right behind the headlight (maybe it is the headlight cable?), I reconnected the battery tray drain tube, I reinstalled the battery tray, reconnected the sensor in/under/thru the battery tray, reconnected power distribution unit, put the battery back in the tray and clamped it down, connected the two positive cables to the new marine terminal on the positive battery post, connected the two negative cables to the new marine terminal on the negative battery post.
Then I pulled my wife's car up to mine, and ran jumper cables between the two to give the dead battery enough to get the jeep started. after about 10-15 minutes, i turned the key in the jeep and it fired right up....
BUT!!!,,,, it dies immediately if you let off the gas. It starts but won't idle. Thoughts on this?
I poked around the forum and have seen possible causes of this:
-Battery connections (I am confident these are the best connections that have existed on this particular jeep... been at some level of horrible corrosion ever since I bought it).
-Alternator - was good before doing the recabling
-IAC (intake air control?) valve - no idea on this one; don't even know where it is, but will look into it some more
-Needs to relearn how to idle - maybe this is a possibility since I had the battery disco'd for about a full day
-Low battery charge on WJ will not let it idle - would this also happen while I have jumper cables connected? It wouldn't idle even with the jumper cables still connected.
Have till Sunday evening to get this running.