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Old 01-25-2014, 12:41 PM
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crittert's Avatar
Join Date: May 2012
Location: Santa Clarita
Posts: 462
Electrical issue

So my 2012 JKU sport wouldnt start this morning. Looked like a dead battery. dim lights clicking of the starter solenoid but no crank. Had AAA look at it and he said the battery was fine but something was drawing off the battery. It jumped fine but on the drive home my ABS, ESP, brake lights were on. I also had intermittent HSA light on and no speedo. My radio was intermittent as well. Drove it for an hour like this. Got it home and it wont start again. AAA comes back out and his battery tester shows the ignition on with the key out of the ignition. Battery tests good again. I cycled the key to dump the codes and got nothing. Any ideas? I've read that it could be the TIPM, wheel speed sensors etc.
Side note. I have had intermittent problems with the traction control system in the past. The dealer got a code for steering wheel misalignment but since it was only intermittent and I'm broke I never had it aligned. Once in a while I would get a traction control fail light but it would always reset after i cycled the key.

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Old 01-25-2014, 01:14 PM   #2
Join Date: Oct 2011
Location: Olympia, WA
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Still sounds like the battery.

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Old 01-25-2014, 02:40 PM   #3
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Even though your battery is only a couple years old I have to agree it really sounds like the battery. Otherwise start with the simple stuff first like the dome light and headlights.
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Old 01-25-2014, 03:06 PM
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Thats what i was thinking too. I'll put a new one in Monday and see if that works. Hopefully the electrical demons are looking the other way.
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Old 01-25-2014, 08:09 PM   #5
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Location: Riverside, CA
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Hey Aaron,
It's probably the battery. They're known to be bad on the '12. Mine died this summer. They replaced it under warranty with no questions asked.

I started a thread on it:
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Old 01-26-2014, 12:05 AM   #6
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Join Date: Mar 2011
Location: Rhododendron, OR
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This is exactly what I wrote about on this thread!

The issue is not necessarily your battery, but your battery terminals. The OEM terminals seem to be loosening and are not adjustable. Open your hood, and wobble the ground terminal, and I bet you it is loose.

The fix I did was remove the 10mm nut on the terminal. Fully seat the terminal down on the post, and with a pair of small (narrow) pliers, squeeze the terminal closed as close to the terminal as you can. Then retighten the 10mm.

I did this, and have not had the issue since (and it was a daily occurrence, as well as the no start issue).

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