Cruise Control Vacuum Line? - JeepForum.com

 
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post #1 of 9 Old 08-16-2013, 07:23 PM Thread Starter
DavisI
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Cruise Control Vacuum Line?

My cruise control light turns on but it won't hold a speed. This seems to be a common problem and this hose seems to be the issue normally.
I saw this the other day while washing the jeep. Is this the vacuum line for the cruise control?

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post #2 of 9 Old 08-16-2013, 08:34 PM
Marksikern
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I don't know what year your jeep is but I have a 1999 and the cruise vacuum line runs from a three way connecter on the passenger side back by the fire wall and runs almost under the top of the firewall toward the drivers side. The 3 way connecter also provides vacuum to the heating and cooling doors and the cut off switch to the AC when accelerating to pass or going up a hill. This can be a damn nuisance when driving in the mountains.

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post #3 of 9 Old 08-16-2013, 09:14 PM Thread Starter
DavisI
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Oh, alright. Anybody have any idea what that hose could be then?
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post #4 of 9 Old 08-16-2013, 09:57 PM
bradywgn71
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It's the drain hose from the battery tray, in case the battery were to boil over.

2002 WJ Overland - 4.7HO - 231tc - 6" Clayton - 285/75-16 Cooper STT - ProComp 5129 wheels - Kevin's Offroad Belly Skid and Rock Sliders - JKS Track Bar and Disconnects - ProtoFab bumpers
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post #5 of 9 Old 08-17-2013, 05:48 PM Thread Starter
DavisI
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Oh ok. Is that where it's supposed to be?
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post #6 of 9 Old 08-17-2013, 10:56 PM
bradywgn71
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Quote:
Originally Posted by DavisI View Post
Oh ok. Is that where it's supposed to be?
Yea, it just hangs there like that.

2002 WJ Overland - 4.7HO - 231tc - 6" Clayton - 285/75-16 Cooper STT - ProComp 5129 wheels - Kevin's Offroad Belly Skid and Rock Sliders - JKS Track Bar and Disconnects - ProtoFab bumpers
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post #7 of 9 Old 08-18-2013, 08:17 AM
multmigs
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if you remove your passenger side headlight assembly you will see a black plastic box that is mounted under it and has a nipple facing towards the engine side which is supposed to be attached to the vacuum line for the cruise and HVAC system.
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post #8 of 9 Old 08-18-2013, 08:48 AM
imaguy3
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Also check on the throttle body area for any hoses off/missing. My vacuum line for cruise came off from there.

http://www.wjjeeps.com/engine/throttle_bdy_01.jpg

http://www.wjjeeps.com/engine/throttle_bdy_02.jpg

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post #9 of 9 Old 08-18-2013, 02:25 PM
grussell
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Once you have the passenger headlight out you will see the black plastic box with a vacuum line attached to it. I just fixed mine this morning. In the picture is the area behind the headlight. You can see the T connector and the cracked hose to the actuator. Both ends were dry rotted. I also replaced the tubing from the T down to the black box. This fixed my cruise control and my AC vents. Before, AC would only blow out the defroster.
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