vacuum line? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 08-22-2012, 12:13 PM   #1
Join Date: Aug 2012
Location: jax fl
Posts: 15
vacuum line?

So I'm hunting for a vacuum leak and followed a line under my battery tray. What is under there and do I need it?

If it ain't broke... fix it till it is!
soxfan69 is offline   Quote Quick Reply
Old 08-22-2012, 12:22 PM   #2
Join Date: Oct 2011
Posts: 1,606
Vacuum reservoir. It's not there as a decoration.

tangofox007 is offline   Quote Quick Reply
Old 08-22-2012, 01:05 PM   #3
RUBI 4 MY MRS's Avatar
Join Date: Feb 2011
Location: California/Nevada
Posts: 1,393
If you notice that line Ts above the battery & goes into the cab. That line goes to the HVAC mode switch. It keeps the HVAC controls (from the mode switch) from changing their settings when the engine vacuum is low like accelerating or going up a long hill. If you lose vacuum the air flow will default to only coming out the defrost vents.

'05 Rubi TJ Unlimited
'93 Toyota 4Runner
RUBI 4 MY MRS is offline   Quote Quick Reply
Old 08-22-2012, 03:59 PM   #4
Join Date: Aug 2012
Location: jax fl
Posts: 15
Thanks.. a reservoir.. sounds like a good place to put something that will get battery acid and corrosion on it.
soxfan69 is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:01 AM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC