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Old 04-08-2013, 04:32 PM   #1
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First time Wrangler owner... couple basic questions.

Just picked up a 2001 Wrangler yesterday with a 4.0 and automatic transmission. Appears to be (and was told) it is pretty much stock and original.
My general intentions are to use this thing to get around most days and it would be considered more of a pavement pounder I'm sure to most of you. It will see some dirt occasionally as I like to do a lot of hiking and mountain biking, but it probably won't see any serious off road use in the very near future. That sounds like an expensive hobby that I'm trying to stall on, for now.

First off: It has 113k and I'm wondering what kind of basic check-up and maintenance I should go through before I start driving this thing regularly... aside from the typical oil & filter change, air filter, fuel filter etc. Anything specific I should do or check around the 100k mark?

Next: I've got two specific questions from my engine bay...

Pic one: I've circled what I'm talking about in red... is there supposed to be a cap of some sort on this fitting? It looks out of place the way it is.



Pic two: There is a long yellow wire that is spliced into another wire down below. It is connected in with the red twist cap, and on the very end of the yellow wire it is just capped off with a yellow twist cap. Any idea what this is for or why it would have been installed? I know the Jeep was towed in the past, possibly a wire to connect power for brake lights etc?



Thanks for any help, info, or suggestions you guys can provide.

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Old 04-08-2013, 04:38 PM   #2
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For the top pic thats just a cap you can pick up at autozone or napa I think I got one for under a buck

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Old 04-09-2013, 12:00 PM   #3
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Thanks, I'm sure I've got something laying around that will do the job for that.
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Old 04-09-2013, 01:07 PM   #4
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Try to capture a pic of the wire that the yellow wire it tapped into.
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Old 04-09-2013, 03:58 PM   #5
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Originally Posted by jeepdude2003 View Post
For the top pic thats just a cap you can pick up at autozone or napa I think I got one for under a buck
Is there a specific name for that cap?
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Old 04-09-2013, 04:59 PM   #6
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Here's some more pics of the yellow wire. Hopefully with these all together you can tell well enough where it is at and connected to.





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Old 04-10-2013, 11:37 AM   #7
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Is there a specific name for that cap?
That should be your air conditioning high-side schrader valve cap. If I'm wrong, it would be your low-side valve cap. The high-side valve is larger in diameter than the low side.
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Old 04-12-2013, 11:26 AM   #8
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That should be your air conditioning high-side schrader valve cap. If I'm wrong, it would be your low-side valve cap. The high-side valve is larger in diameter than the low side.
Awesome! I changed my oil the other day and noticed there wasn't anything covering it and thought it looked liked something should be there. Guess I'll be picking one up this weekend!

Thanks!
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Old 04-14-2013, 07:05 PM   #9
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I would say the best thing you could do for your Jeep is preventative maint. Don't skimp... have a complete tranny flush/refil with BG sythentic fluid... about $160-$200 at most shops. Then have our front/rear differential fluid changed and lastly the front transfer case. Then flush refill radiator. All the above are the most neglected fluids, and the most common to cause expensive repairs... Just my 2 cents worth of advice. While your at it change the spark plugs to ensure best MPG and solid starts.
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Old 04-14-2013, 07:56 PM   #10
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The missing AC cap should be replaced ASAP. You really don't want to get dirt in there. If you have to charge your AC, the dirt will get into the system and mess things up. I'm not sure about your wiring. But I would replace the screw type wire nuts with crimp fittings with shrink tubing so no moisture gets to your wires. Could come back to haunt you later.
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Old 06-07-2013, 05:15 PM   #11
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Still wondering about this loose wire. I think I'm just going to untwist that cap and remove the yellow wire before recapping whatever else is there - unless someone suggests a reason that I shouldn't do that. Got a couple more pics today that may show a little better.


There is a short black wire coming out of the cap that goes directly into the little plug just below it.




There is also a third wire that goes into the cap which comes out from the little wire loom next to the red cap.





Any thoughts?
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Old 06-07-2013, 06:27 PM   #12
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That wire is strange! It looks like it's tapping off of the starter solenoid. Using wire nuts in an automotive application is a NoNo! So the other end of that yellow wire goes to nothing?
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Old 06-07-2013, 06:35 PM   #13
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yeah the yellow wire appears to be goin to the starter ,would help to see where the other end is connected to
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Old 06-07-2013, 08:27 PM   #14
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The other end goes to nothing... Its pretty long and when I got the Jeep it was just running up to the fuse box and wrapped around that several times to apparently keep it out of the way.

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