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Old 07-04-2009, 07:48 PM   #1
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I really need your help-electrical problems

I took my 06 unlimited to the river today just a few unpaved trails. Ran great. I stopprd, got out, tossed a few roses in the river, got back in turned the key and nothing. The speedometer and the tach were jumping from about straight up to red line and the fuel guage was swinging back and forth with the keys out of the ingition while the door was open, when I closed the door everything went back to normal. When I turned the key all I could hear was what sounded like the starter trying to engage. It wouldn't turn over at all. I had to have it towed to a dealership because that's how chrysler does it. If I can fix this myself, I'll go work on it on their lot tomorrow. I just need some suggestions. I did notice a bit of corrosion on the battery cable and of course, I had no tools on me at the time. Any help would be geatly appreciated. I know it's under warranty, but I realy don't want those guys getting their hands on her.

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Old 07-04-2009, 07:54 PM   #2
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Sounds like something got wet and the wetness is allowing a connection to be bridged in the fuse block.

So, if you have time tonight (and it's dry outside or you can get it into a garage) I'd open the hood, open the PDC in front of the battery and see if there is any water and dry whatever you can find.

Same behind the glove box.

Then, take a hair dryer and spend some time drying both fuze boxes. Don't overheat them, but try to dry them off. Give it 10-20 minutes on each. If the issue goes away, keep everything open tonight and it should be good.

If not, well...I'm out of ideas for now. Good luck.

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Old 07-04-2009, 08:02 PM   #3
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FWIW.... there was or is a way to have the gauges move on their own.. a reset calibration of some kind if I recall..kind of like the turn the key for trouble codes.. Perhaps that was part of the madness... Maybe a bad ground?
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Old 07-04-2009, 08:03 PM   #4
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It's been really dry here for about 2 weeks and I didn't hit any water today just a lot of granite dust. It was fine on the trip up. Could just humidity in the air cause this?
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Old 07-04-2009, 08:04 PM   #5
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Sorry, I read "river" and "trip" and assumed that you drove in it.
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Old 07-04-2009, 08:10 PM   #6
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I should have
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Old 07-04-2009, 08:20 PM   #7
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With the gauges it was a self test. Turn the key on and off quickly 3 to 5 times...and the gauges will jump and if you look at the odometer it will show trouble code digits if there is any.

^^^^ no that is not a joke ^^^^

You say the battery was corroded...I'd start there. Clean the post up and see what you got going.
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Old 07-04-2009, 08:31 PM   #8
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I tried but got no readout, not even my mileage was showing. Only certain things would light. If I left the door open with the key in, the bells would eventually stop and then the interior lights would come on faintly. It was really strange. I've obviously never experienced this before but you have to remember that my last car was an 83 BMW (much simpler times)
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Old 07-04-2009, 10:40 PM   #9
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I really want to take care of this myself before the service department gets their hands on her on Monday. Any suggestions on what I should take or try are really appreciated. I'll be picking up a new battery in the morning, is there anything else you can think of that I might need.
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Old 07-05-2009, 10:07 AM   #10
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Clean your battery terminals............
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Old 07-05-2009, 10:14 AM   #11
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Just got back. Replaced the battery, cleaned the terminals and connectors, started right up and drove her home. Thanks guys for all your suggestions. I'm hoping that this is all there is to it. I hate surprises.
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Old 07-05-2009, 10:18 AM   #12
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Originally Posted by 06jeep View Post
Clean your battery terminals............
X2, remove both battery connections, clean them thoroughly, then securely reattach them to the battery. Many odd problems like that can be traced to a bad/loose/corroded battery connection.

Turning the ignition key on-off-on three times within five is how the internal self-diagnostics are launched but doesn't "recalibrate" the gauges. Once you initiate the self-diagnostics (which doesn't work for '98 to 2000 TJs), it will then produce any stored diagnostic codes in the odometer which can be decoded from a list of OBDII codes.

Pressing the odometer reset button in and holding it while turning the key on will cause the gauges to swing throughout their ranges but it really doesn't do anything beyond giving an indication if they are working or not.

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