VIDEO : HOW TO Replace the Main & Auxiliary Battery on a JL Wrangler / JT Gladiator

wayoflife said:
I did not but it can some times take a bit for UConnect to restore information in the compute after a full 12V battery kill. As in, being completely disconnected from the battery. It can sometimes take up to 24 hours and you need to have your Jeep outside to get the signal. During that time, you may experience some weird electrical shit going on. All this is totally normal.
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Is it really true that the Wrangler JL does not persistently save its settings, and a cell signal is needed to "boot" the Jeep? I have noticed that my screen says " Updating Subscriptions" many of the times that I start it up.
 
bobfriesenhahn said:
Is it really true that the Wrangler JL does not persistently save its settings, and a cell signal is needed to "boot" the Jeep? I have noticed that my screen says " Updating Subscriptions" many of the times that I start it up.
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Cell signal not required to boot, but to run updates; the "Updating Subscriptions" is an update that runs on its own then fails.

I went thru this on my 2018, it would run late at night, fail and get stuck updating again and again.

A couple of times the head unit would be on and stuck on the next day (no idea how long it had been on other than it was hot to the touch). Used the tazer to do a reboot when the button reboot maneuver did not work.

I did several hard reboots (luckily, the failed update it did not brick my unit), called Jeep doesn't Care to be told they were aware of the issue, and it required a trip to the dealer to get the update installed; for a fee ($150 at the time) that you will have to pay out of pocket

I opted to keep doing a hard reset, run updates until it didn't fail (30-45 minutes each time) did this as I had time to waste over the course of a couple of weeks, uConnect shitty update.
 
Still not working this morning. I unmarried the Tazer, removed the auxiliary battery lead from the fuse box and disconnected the starting battery. I let it sit for a few minutes, and reconnected. After the Radio reboot, The lights on the dash went out and cameras work again, so we’ll see what it does in the next couple days.

It seems the tazer was giving it issues, I need do update it and reinstall to see if this was the fix
 
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piginajeep said:
Still not working this morning. I unmarried the Tazer, removed the auxiliary battery lead from the fuse box and disconnected the starting battery. I let it sit for a few minutes, and reconnected. The lights on the dash and cameras work again, so we’ll see what it does in the next couple days.

It seems the tazer was giving it issues, I need do update it and reinstall to see if this was the fix
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That's crazy. I appreciate the update. I'm still trying to figure out electrical gremlins on our big Gladiator and may try to unmarry my Tazer as well.

Regarding the auxiliary battery, is there a reason why you didn't disconnect the negative lead from the main terminal?
 
wayoflife said:
That's crazy. I appreciate the update. I'm still trying to figure out electrical gremlins on our big Gladiator and may try to unmarry my Tazer as well.

Regarding the auxiliary battery, is there a reason why you didn't disconnect the negative lead from the main terminal?
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I had no idea how it was wired in, on the fuse box diagram, (N1) it shows the very front terminal was the auxiliary battery, so I disconnected it there. lol,

But yeah, it fixed the weirdness right away soon as the radio rebooted, that took like 30 minutes.
 
piginajeep said:
I had no idea how it was wired in, on the fuse box diagram, (N1) it shows the very front terminal was the auxiliary battery, so I disconnected it there. lol,

But yeah, it fixed the weirdness right away soon as the radio rebooted, that took like 30 minutes.
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Okay. In the future, you could disconnect the middle lead on the main negative terminal. That goes to the auxiliary battery too. But, N1 will do the trick as well.

Good to know that unmarrying the Tazer helped.
 
Going to try and replace the auxiliary battery today. I see at O'Reilly they have 2 different ones which say fit, aux 12 and aux 14. Which one did you guys go with?
 
Nothing to see here! Haha it appears on a 2021 with e-torqe the aux battery is not here. Thanks Eddie for leading me down the wrong trail. Now to find it and whats causing the locker light and other electrical gremlins.1000005061.jpg
 
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jesse3638 said:
Nothing to see here! Haha it appears on a 2021 with e-torqe the aux battery is not here. Thanks Eddie for leading me down the wrong trail. Now to find it and whats causing the locker light and other electrical gremlins.View attachment 418396
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Awe man, that totally sucks!! Please note, I did update the video after things changed and state this the video description...

Screenshot 2024-12-24 160057.png

Sorry for the lack of update on this thread. I'll have to do that now.
 
wayoflife said:
Awe man, that totally sucks!! Please note, I did update the video after things changed and state this the video description...

View attachment 418402

Sorry for the lack of update on this thread. I'll have to do that now.
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No problem. Not your fault. I suppose I should go to your youtube channel now and go off on how it's not correct....haha.

Side note: doing some research it looks like the 48v high voltage power pack unit's life expectancy is around 3 years. Fortunately it appears to be covered under the emissions warranty of 8 years or 80k miles. If that is the issue I'm having should be covered. However if outside of warranty it looks to be stupid expensive to have it replaced.
 
jesse3638 said:
No problem. Not your fault. I suppose I should go to your youtube channel now and go off on how it's not correct....haha.

Side note: doing some research it looks like the 48v high voltage power pack unit's life expectancy is around 3 years. Fortunately it appears to be covered under the emissions warranty of 8 years or 80k miles. If that is the issue I'm having should be covered. However if outside of warranty it looks to be stupid expensive to have it replaced.
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3 years? damn, that's not very long
 
jesse3638 said:
No problem. Not your fault. I suppose I should go to your youtube channel now and go off on how it's not correct....haha.

Side note: doing some research it looks like the 48v high voltage power pack unit's life expectancy is around 3 years. Fortunately it appears to be covered under the emissions warranty of 8 years or 80k miles. If that is the issue I'm having should be covered. However if outside of warranty it looks to be stupid expensive to have it replaced.
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Well damn, I sure hope it is covered for you. Seems crazy that you'd have to replace that thing once ever 3 years!!
 
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