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New Middletown, OH
check out www.bbbind.com for wiring schematics on your vehicle.
place a piece of carpet or a tire between your front bumper and a wall and let it idle in drive for 20 minutes so the pcm and keep alive memory chip(kam)can relearn the idle.
its on the transmission.look on the drivers side front axle.remove the airbox and look for a two wire connector.
the fill hole will be on the transfer case itself.you'll see two pipe plugs.one above each other.unthread the top one and just fill it with the proper fluid till it runs over and your full.the bottom plug is for draining.
Put the Grand Cherokee's ignition key into the ignition and turn it to "Run." Don't start the engine. 2 Locate the "Step" button on the Grand Cherokee's instrument panel and press it. Press it again until it says "Miles to Service." 3 Press in and hold the button for about five seconds. It should read "Reset." This will turn off the service light on the display. Read more: How to Reset a Service Light on a 2006 Jeep Grand Cherokee Laredo | eHow.com http://www.ehow.com/how_7156733_reset-jeep-grand-cherokee-laredo.html#ixzz2CLhi9EX6
an independant shop can do that repair no problem.very labor intensive tho so look to spend about $1000.00 give or take a few for your area.thats an auto md price which is $200 cheaper then a dealer would charge but you will get the same quality parts in the process.that price includes the water pump as well cause if its 20 years old,let them change it.my book lists the 4.0 lexus v8 engine as a non interference engine so no damage will be done to the engine if the timing belt breaks.good luck.
might be a stuck fuel injector.its common in those 4.0 engines.
try replacing the asd relay(automatic shut down relay)
disconnect the battery for 30 seconds.
check the cigarette lighter fuse.that usually powers the dlc.