Question about 2003 Jeep Grand Cherokee

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The cruise control stopped working and the ac will only blow out of the defrost vents...I read where this might be a vacuum line problem, but I am reading conflicting online info as to where it might be located (the hose) I have a 2003 Jeep Grand Cherokee. Would this hose be on the drivers side or on passenger side under battery?

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Do you have the 4.0 inline 6? If you here a sucking or hissing sound you have a vaccumn leak,this wIll cause the air to go to the defrost mode.THE ENGINE WILL RUN FASTER AT IDLE AND BE A BIT ROUGH..Firstly,i would look for a hose off, AT THE INTAKE MANIFOLD,split, or a bad vacuumn canister,or reservoir.do you here a leak inside,THE CAB,with engine running?The 1/4 INCH line runs under the battery and to the vaccumn canister,positioned right behind the bumper shell on the passengers side,there are 2 or more t's in this line you MIGHT TRY AND UNHOOK THE END AT THE CANISTER AND CAP IT OFF TO SEE IF THIS CORRECTS HEATER CONTROLS. iF YOU LOOSE ENOUGH VACUMMN THE SPEED CONTROL SERVO WONT ACCELERATE THE THROTTLE.Hope this gives you a start on a fix!

Posted on Sep 11, 2010

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As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

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http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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