I just fixed this on my 2004 Grand Cherokee about an hour ago. I only had air/AC from the defrost vent. I read a gazillion posts about a 5 inch long vacuum line, attached to the cruise control thingy under the battery. Mine was cracked at both ends. Borrowed a section from my radiator overflow to replace it...and Wham! AC from any vent I set it at. Its a bugger to get to,,but well worth the effort. Hope it helps.
No.
NoNo
Residual vacuum from vacuum reservoir.
Chrysler transmissions do not have modulator valves.
yes it does but i do not know where it goes to, i have a 98 and my vacuum line came off and is still connnected to the tranny
A vacuum line near the gas tank on a 2003 Jeep Grand Cherokee is there to keep the tank from locking up due to an air pressure imbalance. If there is an imbalance of air pressure the tank will vapor lock and the engine will not get fuel.
Will affect highbeam light on gauge cluster, MAY also affect low beams..
It goes to the ac/heater control head.
loose vacuum hose. need to know where it connects
No, the Grand is different from the Cherokee.
The Grand Cherokee did not exist until the 1993 model year.
A seat from a 1999-2004 Grand Cherokee is what fits in a 1999-2004 Grand Cherokee.