Question about 2005 Jeep Grand Cherokee
I had this same issue, turned out to be the rear diff wiring harness had corroded and shorted. Get the mechanic to check this and the rear diff soleniod
Posted on Jan 13, 2010
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Posted on Jan 02, 2017
This is caused by by a bad ignition switch. According to the dealer the ignition switch contains an antenna that many of the sensors use to communicate with the vehicle, as well as the key fob. When the switch starts going bad the vehicle computer losses communication with these sensors and starts producing codes which include the 4wd and the electronic brakes. My fiance has had the same issues with her Grand Cherokee as well as the key fob not working, the remote start not working, the service engine light comes on, the door chime will sound when the key is NOT in the ignition and the lights are NOT on, as well as numerous codes usually relating to loss of communication with one system or another. All of which are fixed once the ignition switch is replaced. Unfortunately, this usually only fixes the problem for a short time (weeks or maybe a few months) before the piece of junk ignition switch fails again and it all starts over.
Posted on Mar 10, 2009
According to the mechanic who works on my 94 Jeep it's one of three
1) Corrosion on the connector to the switch (which is located on top of the transfer case).
2) A bad switch. Part cost about $22.00 or,
3) A bad console display. he says they have had a fair number of console display units fail.
Posted on Jul 15, 2009
There is a software updated for this concern if there are no driveabilty problem the dealer needs to undate the 4wd software.
Posted on Oct 21, 2009
SOURCE: I have a 2003 Yukon
My 2003 yukon xl does the exact same thing. Sorry that I do not have a solution, but I figure its the same reason the daytime running lights always burn-out. The SUV in general has be an absolute POS and I will never buy another.
Posted on Nov 11, 2009
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