I Just finished my new head and exhaust and intake on my 99 wrangler sport. I had to do all this due to wifey saying i'll put cold water in it its just a lil hot. Ya know just helping me out, saving me the trip and what not.

I however overtightened the last bolt i put in and cracked the Thermostat housing in half. OOps. Now what really sucks is that i have to wait 4 days for the part to come in from prescott arizona. I live in hawaii, and there are none here. Not the parts stores on any island, nor the junkyards, not even the stealership could get them till they got an oreder from the mainland. Damn, now i bought it online cause i want it bad enough. Now that a 16.99 part cost me like 64.99 to get it overnighted to hawaii. (oxymoronic statment seeing as how it still takes 3 to four days to hawaii).

So you can imagine that i have been hovering over my jeep really wanting to fire it up and check out the job i did. But the lack of parts has me sitting at home. I have double check things triple checked them and i am almost sure i have it back to factory.

Then... i find this, a connection that i didnt unplug. I have looked all over anywhere that that plug can reach and havent found the mate to it.

You can see the plug it has four wires going to it laying on the brakebooster. If you know what this plugs into or what its for, would you mind enlightnening me? If so your help would be greatly appreciated.

hope this helps as you can see this one has only three wires,01 tj

Thanks alot however. I just looked and my plug has Four wires coming out of it. what does that plug into on yours? I was thinking it may have something to do with the diagnostics but thats under the drivers side dash. This jeep is also equipped with the Chrsyler EVS. The stock alarm.

mine comes out of harness to socket next to square rubbermounted canister,from there it goes to here(photo)

here is my routing,

yeah i have the same plug on mine its all the exact same as yours but then i seem to have this "xtra" one

Well bra,your search is definitely on!Sorry no help here.Goodluck.

yeah thanks guys. Im gonna hide it and pretend i didnt find it. The jeep ran great prior to the overheating incident. May be a reason to ask the dealer, do you think they could tell me easy enough?