Deleting (Removing) the Aux Battery

[Bryce919er]

Nothing that has not been covered before, in fact I think half of this forum is related to the aux battery, but because there is so much over complication out on the internet including:

1. dudes literally RIPPING an entire fender off the side of the Jeep
2. people cutting rivets off
3. guys tearing the fuse box all apart

I figured I would add my own post.

Remove two Christmas tree push pins--carefully for reuse.

Peel back the curtain

Remove the (3) 10mm bolts. I used a long extension on a small battery impact to get it over with quick without hanging too long.

Here is where information was lacking...then what happens? will the battery be hanging by the cables? Can you reach the top to remove them while holding the battery? The answer is its easy. The cables have enough slack the battery will lower down until it rests on the wiring harness / frame rail. With the battery supported by the frame you are free to use both hands to reach up & have enough room to remove the (2) 10mm nuts that secure the cables. I used a 10mm socket on a small 1/4" ratchet, a ratcheting box end wrench would work also; just do not touch both terminals with the tool. The cables were a little "stuck" to the terminals even with the nuts removed but easy enough to wiggle free. Then remove the aux battery down & do not let the exposed cables touch each other.

Remove & save those studs & nuts if you discard the battery. If your 6pt sockets go small enough eventually you will get to one that fits to loosen the studs with a ratchet. I assume 12pt will work also.

Rather than discarding it, since my aux is still good & the one for the motorcycle isn't, I suspected & was happy to find its an exact match. Saving money.

I put a cap over the exposed (+) terminal & taped it up.

Then for good measure did the (-) & zip tied them together.

I then put the original aux battery blanket back in the lower box & bolted it back in place.

Pull fuse 42 (red 10A).

No other changes up top. Done.

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[WillysMeow]

Good job and great write up!

 

[JU235]

Huzzah, thanks!

 

[MikesMojito]

Great write up, but why is your engine bay so clean...

 

[iklo]

I noticed yours is 2024. Will this not void the warranty?

 

[deadpool]

Best write up so far thanks much!

 

[Scott97]

Excellent step by step, thanks!

 

[nU7OuxIx]

I know there's tons of posts on this topic and I can scroll for days through the pages, or I can ask a dumb question here.

Anything happen when this is done? Any lights on the dash? Do you need tazer to disable anything? Do you need to press or ignore the start/stop button?

Thank You!

 

[MOOG5050]

I know there's tons of posts on this topic and I can scroll for days through the pages, or I can ask a dumb question here.

Anything happen when this is done? Any lights on the dash? Do you need tazer to disable anything? Do you need to press or ignore the start/stop button?

Thank You!

I just disconnected and left the battery in place and pulled the fuse. No codes. 5 minute job.

 

[Bryce919er]

Best practice is to also disable ESS. I have the Autostop Eliminator to avoid pressing the dash button.

 

[nU7OuxIx]

Best practice is to also disable ESS. I have the Autostop Eliminator to avoid pressing the dash button.

What happens if you remove the battery and fuse without disabling ESS?

 

[JU235]

What happens if you remove the battery and fuse without disabling ESS?

Cats and dogs, living together.

 

[Bryce919er]

What happens if you remove the battery and fuse without disabling ESS?

1. Supposedly after 6 ESS events it will turn off ESS until the next key start (so what).
2. Supposedly if some ultra rare scenario is just right some module may not have enough power during engine restart & may inadvertently power cycle the module (thought to be why the aux battery exists in the vehicle in the first place).

Ya, Ive read way too much on here. The above applies to any tampering with the aux battery; same if you just disconnect the negative cable up top instead of full remove.

Otherwise ESS will continue to operate as normal with the aux battery disconnected or removed & fuse 42 removed.

 

[THAW]

1. Supposedly after 6 ESS events it will turn off ESS until the next key start (so what).
2. Supposedly if some ultra rare scenario is just right some module may not have enough power during engine restart & may inadvertently power cycle the module (thought to be why the aux battery exists in the vehicle in the first place).

Ya, Ive read way too much on here. The above applies to any tampering with the aux battery; same if you just disconnect the negative cable up top instead of full remove.

Otherwise ESS will continue to operate as normal with the aux battery disconnected or removed & fuse 42 removed.

Also, there can be a popping noise on the sound system during the ESS restart.

 

[Cips]

You motivated me to finally remove mine. It's been bypassed at the main for a year and a half.

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