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Old 08-08-2014, 07:38 PM   #1
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All warning lights came on and Speedometer went to zero to 85mph

Today when I was driving on the highway at around 70mph, at 3 different times I heard a chime (like when seatbelt isn't on), ALL the warning lights came on, and the speedometer went from zero to 85MPH and then 70mph. I haven't done any mods to my jeep in months so it's not like I screwed something up. Any ideas? I searched the threads but couldn't find anything. Thanks.

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Old 08-08-2014, 07:45 PM   #2
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Check the battery connections. Mine did it too. It was the negative battery connectors. They were just a little loose. Also make sure they ALL the way down on the post.

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Old 08-08-2014, 07:52 PM   #3
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I had a terrible issue with warning lights when my sway bar disconnect got wet. When the wiring harness connection to the disconnect was disconnected all of the problems went away. The lesson: When anything connected to the CAN Bus goes haywire, the whole system goes haywire. I have since replaced the remote disconnect with a mechanical one.
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Old 08-09-2014, 09:32 AM   #4
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My '13 was doing the (almost) same thing. Tighten down the negative post. Hopefully that will cure it. Mine wouldn't snug up enough, had to buy a small lead cup that goes on the battery post. That did it.
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Old 08-09-2014, 11:55 AM   #5
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Quote:
Originally Posted by jk'n View Post
I had a terrible issue with warning lights when my sway bar disconnect got wet. When the wiring harness connection to the disconnect was disconnected all of the problems went away. The lesson: When anything connected to the CAN Bus goes haywire, the whole system goes haywire. I have since replaced the remote disconnect with a mechanical one.
Exact problem I had. The dealer is replacing the the electronic sway bar disconnect assembly and wiring harness on Monday.
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