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Voltage going wild despite being a newer battery. Multiple issues.

AZGreen

New Member
First Name
Chase
Joined
May 7, 2022
Threads
2
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3
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11
Location
RP, Germany
Vehicle(s)
2022 Gladiator Rubicon
Occupation
Army
2022 Jeep Gladiator Rubicon
15,950 miles
Stock except the tires and front bumper (removed the winch since being stationed in Germany)

Hey all, I've been experiencing a few issues for about a month now. I got the "aux battery charging" message on my dash about a month ago and did the fuse / disconnect the lead fix the same day. I replaced my main battery a day after that as it was also on it's way out at a little over 3 years and some over-seas travel had taken its toll. Life carried on as normal will no issue until this morning.

I started the Jeep up for work and was greeted by the same aux battery message I received a month ago despite it being disconnected and the fuse being pulled. I found it odd but didn't think anything of it. Then the headlights started going from normal to dimming back to normal. Then the radio had an occasional crackle through CarPlay and USB-C. Then I noticed the jeep stuttering a bit at idle. I went into the car info dash screen and watched my battery voltage go from 10.Xv to 15.9v and everything in between constantly. My dash would occasionally illuminate with the "service traction control" notification and the ABS light would pop on for a second and then disappear.

I had the same issues on the drive home (short day at the office) and when I pulled into my driveway I got the multimeter and tested the battery voltage with the vehicle off after about 30 minutes of making / eating some lunch. 17.6 / 17.7 was the reading.

Could the alternator really be messing up after only 3 years and 16k miles? Am I just dumb and don't know how to use a multimeter? Could I just have a bad battery? I'm awful with electrical stuff so I'm kind of in the dark here.
Jeep Gladiator Voltage going wild despite being a newer battery. Multiple issues. IMG_3336
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Lost1wing

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First Name
Tim
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Location
West Georgia
Vehicle(s)
2020 Jeep Gladiator Rubicon
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Retired AMT
The ecu controls the alternator output via the IBS sensor. You could have a shorted cell in your battery. You would need to measure the voltage of the battery with the engine and all of the accessories off. You should check all of your connections. Loose or dirty connections could cause voltage issues. Unplug the IBS sensor and look at the connector for corrosion. I would remove it just to clean the top and bottom mating surfaces.

You should also take a look at the plug goung to the alternator. Maybe even follow that harness to look for rubbing or damage.
 
 







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