Question about 2002 Jeep Grand Cherokee
The mode control on your heater panel uses engine vacuum to operate the doors in the heater box. when the system loses vacuum, it defaults to the defrost setting. find the small plastic vacuum line that penetrates the firewall and leads to the engine intake manifold. Check the hose that attaches the line to the engine for cracking or looseness. If that is OK, trace the line back into the cabin. It should lead to the control panel. Check any tees or couplings for leakage. If it's good all the way to the mode control switch, it is likely the connection to the switch or the switch itself is leaking. With the engine running, listen carefully to the switch for hissing. It is also possible that the defrost door actuator is bad. If you can find the door, try applying vacuum directly to the actuator to see if it operates to shift the flow. If it doesn't, replace the actuator.
Posted on Feb 11, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Hello and welcome to FixYa
The interior lights wont turn off cant because it can't get a conncetion definitely a headlight switch issue common problem for that make
Part # 05137535AA Headlight Switch Probably a dealer item very simple to change this yourself. Hope this gets you going.Please Rate Me. And you can always Ask Me.
Posted on Apr 27, 2009
SOURCE: 2002 jeep cherokee laredo
My 98 Jeep Grand Cherokee had the same problem. Over heated when standing still. Took it to dealer and they could not find any problem with cooling fan. After doing my own investigation I found out that the electric cooling fan would begin to seize up after about 1hr. of operating. (gets hot)
The dealer would look at fan and see that it was running and think its ok. The problem is, it wasn't running fast enough.
I have a relay on the right side of front fender and jumped the fan to stay on with motor off. (must know what your doing). After about 1hr. fan started slowing way down. Returned it to dealer told them what the problem was. They were not smart enough to jump the relay so they put a couple hundred miles on it even though i told them it works OK when moving. Make sure you tell dealer to use the relay to jump.
Replace cooling fan motor. Works great
Posted on Feb 27, 2009
There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.
Posted on Jul 01, 2009
Tips for a great answer:
Jun 18, 2017 | Cars & Trucks
Mar 13, 2017 | 2002 Jeep Grand Cherokee
Nov 05, 2012 | Cars & Trucks
Jun 09, 2012 | 2005 Jeep Grand Cherokee
Sep 09, 2011 | 2002 Jeep Grand Cherokee
Jul 17, 2010 | 2001 Volvo S80
Jul 03, 2010 | 2000 Jeep Grand Cherokee
Jun 17, 2009 | 1999 Jeep Grand Cherokee
Jun 13, 2009 | 2002 Jeep Grand Cherokee
Jan 12, 2009 | 1996 Jeep Grand Cherokee
557 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: