Deleted ESS Battery

[UncleArt]

I defused the ticking time-bomb today. This is a MY22. I wasn’t having any problems yet; but I wanted to get this taken care before this summer’s adventures.
I deleted the Aux battery & replaced the main battery with an Odyssey ODP-AGM94R. Removed the little batt through the wheel well, taped off the cables, & removed fuse F42.

Edit: I don’t use the stop/start function & have it disabled with my Tazer.

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[jludave]

@UncleArt Keep in mind that even with all you did, ESS is still enabled. It will run off your single battery. You will need to press the button to disable it every time you start the vehicle or will need a device that remembers the button press for you.

 

[UncleArt]

@UncleArt Keep in mind that even with all you did, ESS is still enabled. It will run off your single battery. You will need to press the button to disable it every time you start the vehicle or will need a device that remembers the button press for you.

Understood. I don’t use it & I have it disabled (remember last state) with my Tazer.

 

[SonofaSeabee]

@UncleArt Keep in mind that even with all you did, ESS is still enabled. It will run off your single battery. You will need to press the button to disable it every time you start the vehicle or will need a device that remembers the button press for you.

What's the upside or downside in keeping the aux battery in there, when bypassed? I bypassed the aux battery, can it just stay in there, for say, 10+ years, no worries?

 

[UncleArt]

What's the upside or downside in keeping the aux battery in there, when bypassed? I bypassed the aux battery, can it just stay in there, for say, 10+ years, no worries?

Probably doesn’t matter either way. Saves a few pounds - my Odyssey battery was definitely heavier than the stock one.

 

[Rhinebeck01]

What's the upside or downside in keeping the aux battery in there, when bypassed? I bypassed the aux battery, can it just stay in there, for say, 10+ years, no worries?

As someone that bypassed (not deleted) the JL, Aux battery long long before I believe anyone.... over 88,000+ miles and 5 or so yrs. ago .....

I do feel most guys and gals, (not all) are far better off bypassing the Aux battery and just leaving the Aux battery in place..

Use the Aux battery as a backup battery to the Main or just leave it be... let it rest in piece. Don't waste time, etc. deleting it.

In less then 5 min. you can bypass the JL's Aux battery and be done with it. Drive that now, single battery JL like your old TJ, JK, your old Chevy with their single battery. Yes, you need to still maintain that single battery or...

Reality is, there's no major reason really to actually delete the aux battery. Sure there are reasons to bypass the Aux battery and with a bypass it is easily reversible.

Why bastardize a vehicle that has a warranty.. Bastardize and often vehicle resale value will be negatively impacted. Bastardized vehicles can be a pain to diagnose/to work on..

Delete the Aux battery and you also then have a vehicle that a factory tech and other wrenches will be more hesitant to work on and more.

Anyway, other then to shed say 4 or 5 lbs. there is really little reason to bother deleting the aux.

To delete the Aux battery is personal preference...

 

[SonofaSeabee]

As someone that bypassed (not deleted) the JL, Aux battery long long before I believe anyone.... over 88,000+ miles and 5 or so yrs. ago .....

I do feel most guys and gals, (not all) are far better off bypassing the Aux battery and just leaving the Aux battery in place..

Use the Aux battery as a backup battery to the Main or just leave it be... let it rest in piece. Don't waste time, etc. deleting it.

In less then 5 min. you can bypass the JL's Aux battery and be done with it. Drive that now, single battery JL like your old TJ, JK, your old Chevy with their single battery. Yes, you need to still maintain that single battery or...

Reality is, there's no major reason really to actually delete the aux battery. Sure there are reasons to bypass the Aux battery and with a bypass it is easily reversible.

Why bastardize a vehicle that has a warranty.. Bastardize and often vehicle resale value will be negatively impacted. Bastardized vehicles can be a pain to diagnose/to work on..

Delete the Aux battery and you also then have a vehicle that a factory tech and other wrenches will be more hesitant to work on and more.

Anyway, other then to shed say 4 or 5 lbs. there is really little reason to bother deleting the aux.

To delete the Aux battery is personal preference...

Informative info, as always, thank you!

 

[UncleArt]

As someone that bypassed (not deleted) the JL, Aux battery long long before I believe anyone.... over 88,000+ miles and 5 or so yrs. ago .....

I do feel most guys and gals, (not all) are far better off bypassing the Aux battery and just leaving the Aux battery in place..

Use the Aux battery as a backup battery to the Main or just leave it be... let it rest in piece. Don't waste time, etc. deleting it.

In less then 5 min. you can bypass the JL's Aux battery and be done with it. Drive that now, single battery JL like your old TJ, JK, your old Chevy with their single battery. Yes, you need to still maintain that single battery or...

Reality is, there's no major reason really to actually delete the aux battery. Sure there are reasons to bypass the Aux battery and with a bypass it is easily reversible.

Why bastardize a vehicle that has a warranty.. Bastardize and often vehicle resale value will be negatively impacted. Bastardized vehicles can be a pain to diagnose/to work on..

Delete the Aux battery and you also then have a vehicle that a factory tech and other wrenches will be more hesitant to work on and more.

Anyway, other then to shed say 4 or 5 lbs. there is really little reason to bother deleting the aux.

To delete the Aux battery is personal preference...

Leaving a bypass battery in place cannot be considered a backup over time. It will not be charged or hold its charge. It will degrade over time. Deleting it but leaving all of wiring infrastructure in place is not bastardizing the vehicle. To go back to factory later, like for resale; one could put a new battery in. It’s just one less thing to maintain or worry about. This is precisely why I didn’t delete all the wiring & PCR relay like many have done.

 

[Rhinebeck01]

Leaving a bypass battery in place cannot be considered a backup over time. It will not be charged or hold its charge. It will degrade over time. Deleting it but leaving all of wiring infrastructure in place is not bastardizing the vehicle. To go back to factory later, like for resale; one could put a new battery in. It’s just one less thing to maintain or worry about. This is precisely why I didn’t delete all the wiring & PCR relay like many have done.

@UncleArt

As for the bypassed, Aux battery as a back-up.... as long as you maintain the bypassed Aux, it is there as a backup should you need it....... My Aux is very healthy, as I maintain it...

Should you ever need to take your JL with deleted Aux battery to a dealership for say electrical work / issues possibly related to 12v..... you will see first hand how you pay more $ for diagnostics/troubleshooting by Tech and work in general by the Tech, then if the vehicle was stock 12v wise. You may also find the Tech is unable to come up with a remedy as he and also his WiTechll is lost lets say in what's wrong in regard to your JL's bastardized 12v system..

Anyway, as I mentioned I believe "most" JL owner's are better off just bypassing the Aux.. Enjoying their unbastardized, JL til they blow it off in a few years...

Again, as I said... it's personal preference in regard to what you do. To each his own....

Last comment by me in this thread..

 

[Kleiss1]

you.

I Have a aftermarket rear bumper from fishbone offroad. The

driving.

@UncleArt Keep in mind that even with all you did, ESS is still enabled. It will run off your single battery. You will need to press the button to disable it every time you start the vehicle or will need a device that remembers the button press for you.

Mine has only come on once since I pulled the fuse and disconnect the negative cable. Over a year.

 

[jludave]

Mine has only come on once since I pulled the fuse and disconnect the negative cable. Over a year.

If you are referring to ESS, it is still enabled and running off your single battery if you are not manually turning it off or have a device remember the off state.

Your braking technique may be such that you aren’t stepping on the brake pedal enough to have ESS kick in.

 

[4x4tographer]

Off topic - but do you mind sharing some information about your bus bar install there for your aux switch accessories? That's a pretty clean install there!

 

[UncleArt]

Off topic - but do you mind sharing some information about your bus bar install there for your aux switch accessories? That's a pretty clean install there!

Not at all. I got the terminal strip from Amazon; and custom made the bracket. Nuts & Bolts from Home Depot. The series of holes you see under the terminals are for tie wraps to secure the wires. Here’s some pics:

 

[68Jeepster]

Leaving a bypass battery in place cannot be considered a backup over time. It will not be charged or hold its charge. It will degrade over time. Deleting it but leaving all of wiring infrastructure in place is not bastardizing the vehicle. To go back to factory later, like for resale; one could put a new battery in. It’s just one less thing to maintain or worry about. This is precisely why I didn’t delete all the wiring & PCR relay like many have done.

I'm going to wait to do anything with the battery until after the warranty is up but having been bit by the defective battery once already, it'll be one of the first things I do (after disabling ESS with a Tazer). I'm leaning towards removal of the aux from the standpoint of if it's not charged, I've seen more than a couple stone dead batteries freeze and bust in our neck of the woods.

If I need to jump the main, I'll break out the jump pack and or cables. However I will leave the infrastructure in place should I sell it.

Thanks to you and Rhinebeck01 for documenting this and laying out the options.

 

[beewil]

As someone that bypassed (not deleted) the JL, Aux battery long long before I believe anyone.... over 88,000+ miles and 5 or so yrs. ago .....

I do feel most guys and gals, (not all) are far better off bypassing the Aux battery and just leaving the Aux battery in place..

Use the Aux battery as a backup battery to the Main or just leave it be... let it rest in piece. Don't waste time, etc. deleting it.

In less then 5 min. you can bypass the JL's Aux battery and be done with it. Drive that now, single battery JL like your old TJ, JK, your old Chevy with their single battery. Yes, you need to still maintain that single battery or...

Reality is, there's no major reason really to actually delete the aux battery. Sure there are reasons to bypass the Aux battery and with a bypass it is easily reversible.

Why bastardize a vehicle that has a warranty.. Bastardize and often vehicle resale value will be negatively impacted. Bastardized vehicles can be a pain to diagnose/to work on..

Delete the Aux battery and you also then have a vehicle that a factory tech and other wrenches will be more hesitant to work on and more.

Anyway, other then to shed say 4 or 5 lbs. there is really little reason to bother deleting the aux.

To delete the Aux battery is personal preference...

Here is my aux battery option I chose on
New 24’ Rubicon X JL 3.6 Auto.

1. install Tazer mini for “Turning off” ESS

2. Keep batteries where they are in the Jeep

3. Run extended battery tender harness from main battery to 1.25 amp battery tender/MAINTAINER. Use Maintainer to keep both aux battery and main at fully charged levels. Easy to plug in when parked in my garage.

4. Read hundreds of more excellent opinion pages on this topic (dual battery, battery delete, battery bypass) over the next 7 years until my extended warranty expires. Or until I get my Masters in Jeep Aux battery subject.

Do you or anyone have some advice/thoughts on my plan for the aux battery? Thanks in advance.

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