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Severe Electrical Issues

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Old Mar 8, 2021 | 10:40 AM
  #1  
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Default Severe Electrical Issues

I have a 2014 jk and a few months ago it developed electrical issues i haven’t been able to figure out. It has 9 codes

P2504 Charging system output voltage hi
P0573 Brake switch 1 hi
U1417 Implausible left wheel distance signal received
U1418 Implausible right wheel distance signal received
U1408 Implausible brake signal received
C107C Brake pedal switch 1/2 stuck
C1000 Brake pedal switch 1 circuit performance
C2103 System voltage high
C2101 Battery voltage high

The problems first started with just surging voltage while driving, i tested the alternator and it tested fine. Battery is still new. Any ideas what could be wrong? It’s progressively gotten worse and I can’t drive it anymore without the entire electrical system surging. Any help would be greatly appreciated
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Old Mar 8, 2021 | 05:58 PM
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Off the bat I’d think you have an issue in your wiring harness or one of your modules somewhere. I’m not super familiar with the electrical system so I can’t help specifically. I would check out any exposed wire harness for damage. It could be a common ground wire for the harness that is broken or another wire chaffing on something causing a short.

Aside from that, even if it were me I wouldn’t dive too much into it. I’d just let a dealer or another reputable shop handle it. They’ll have high dollar computers there can narrow things down a bit more.
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Old Mar 9, 2021 | 01:54 PM
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See if the alternator is ok!! Internal regulator may be going out.
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Old Mar 9, 2021 | 06:09 PM
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I had similar problems with weird $hit going on when my battery went south
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Old Nov 3, 2025 | 05:56 AM
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Any idea how to fix? I am having the same problem.
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Old Nov 3, 2025 | 07:10 AM
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Any idea how to fix? I am having the same problem.
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Old Nov 3, 2025 | 06:45 PM
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Originally Posted by Ccnuckols
Any idea how to fix? I am having the same problem.
I ended up taking it to the dealer and it was a faulty battery, replacement fixed it right up.
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Old Jan 20, 2026 | 02:03 PM
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From: Türkiye
Default U0141

[QUOTE=elvira_jk;4377492]2014 model bir JK'm var ve birkaç ay önce çözemediğim elektrik sorunları yaşamaya başladım. 9 arıza kodu veriyor:

P2504 Şarj sistemi çıkış voltajı yüksek,
P0573 Fren anahtarı 1 yüksek,
U1417 Mantıksız sol tekerlek mesafe sinyali alındı,
U1418 Mantıksız sağ tekerlek mesafe sinyali alındı,
U1408 Mantıksız fren sinyali alındı,
C107C Fren pedalı anahtarı 1/2 takılı,
C1000 Fren pedalı anahtarı 1 devre performansı,
C2103 Sistem voltajı yüksek,
C2101 Akü voltajı yüksek.

Sorunlar ilk olarak sürüş sırasında voltaj dalgalanmalarıyla başladı, alternatörü test ettim ve sorunsuz çalışıyor. Akü hala yeni. Ne yanlış olabilir diye bir fikriniz var mı? Giderek kötüleşti ve artık tüm elektrik sistemi dalgalanmadan aracı kullanamıyorum. Herhangi bir yardım çok makbule geçecektir.[/QUOTE
]Hello, I'm experiencing a problem with my 2010 Jeep JK 2.8 related to the U0141 fault code. The Full Power Integrated Circuit (FPC) error message indicates a problem with the engine or transmission.
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