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Discussion Starter · #1 ·
All four vac lines are broke into right under the battery tray on my 89 Wrangler. My question is this. I found two yellows, a black, and a green leaving the Diff and where they're coming from the Trans. Case there is one red, one yellow, one blue, and one green. How do I reconnect these things correctly since the colors aren't matching up.

 

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If you do a search you will see that I was pulling my hair out over the same crap for two months. For once, I get to help someone AND be right!!!!!
OK, first, the red one coming from your transfer case is the hose for the vacuum source(constant). That will hook up to a hose running behind your air cleaner. Take a look and you will probably find the remains or the original red line. Not sure how yours is color coded exactly, but here is the way I set mine up. Take apart the plastic housing around the vacuum harness(don't break it) to see the lines. Connect what seems to match up for now.
1. (blue line) Leave hanging, it has a check valve on it which gets hooked to nothing.
2. (red line) Hooks up to a good constant vacuum source off of the manifold.
3. (green line) goes to the shift motor on the front axle. Horizontal on the shift motor.
4. (black soft vacuum hose) goes to the plug on your firewall by the battery for the 4wd indicator on the dash.
5. (yellow line) goes straight to the shift motor; one of the lines that goes into a two line plug verticle on the shift motor.
6. (black hard line) goes with one of the yellows to the shift motor. Plug located vertically on top.
I hope this helps out a little.
Your best bet is to cough up the $30 that a new vacuum harness costs at the dealer and install that instead of driving yourself insane with broken lines.
Let me know of any more questions or specifics and I will go outside and take some notes on how mine is set up. Because of these lines, I had to drive my YJ in a blizzard in 2wd. Not fun/wwwthreads_images/icons/tongue.gif

Bryan/wwwthreads_images/icons/crazy.gif
 
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Discussion Starter · #3 ·
you seem to be right on bryan!
i just went and looked at my set-up.
i noticed my blue line was chopped off and going nowhere and you explained that!
my 4wd works fine so did not panic over the blue. /wwwthreads_images/icons/shocked.gif
thanks for the info on the soft hose to the 4wd indicator light! /wwwthreads_images/icons/wink.gif
you are on your toes on this subject! /wwwthreads_images/icons/smile.gif
this should help yoda or say luke in this case! /wwwthreads_images/icons/laugh.gif
steve
 

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I would defer to Bryan on how exactly the YJ front axle set up is, since my Cherokee's set up is a little different. I would only like to add that you should take the time as a preventative maintenance measure to grease the shift collar and axle splines. Sooner or later, they will stick and the vacuum motor can't overcome that. This would also be a good procedure if anybody out there has converted the vacuum to a cable actuated system. Good Luck!!/wwwthreads_images/icons/smile.gif
 
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Discussion Starter · #6 ·
On a related note. The plastic vac lines are not battery acid proof. Mine got eaten by the stuff so i I used rubber vacuum lines to make repairs. I figure the same person who put non-acid proof lines under the battery, is the same person that designed the cupholders in my console.
CTjeepnut

Funny thing is, the more I practice, the luckier I get
 

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ditto on using rubber vacuum lines to make repaires on the cracked plastic lines, works great!

/wwwthreads_images/icons/cool.gif Big Ed
'88 YJ, 4" susp,3" body,33's,283 Chevy V8,TH350,4.11's,D30,D35c
 
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