Start/Stop battery is STUPID!

[Caspien]

No way I can justify the outrageous cost of their brackets and so on - crazy, and the loss of engine bay space. Sorry, That's almost worse to deal with than working to replace a battery when needed (and I go through the wheel well, crank wheels hard left, 2 clips and a screw, pull back fender liner, access battery)
I priced just their brackets- holy cow, I thought Jeep dealer accessory prices were crazy.

That's exactly where I'm at with it.... and like I said, if I'm gonna go that far in, for the bracket alone, I may as well go all in with the gen 3 or something.. but then, I was also a Boyscout... and trying to always 'Be Prepared' for anything, means I tend to overbuild EVERYTHING.

May look at it, this weekend (after buying a new battery charger..my old 'Die Hard', circa 1980-ish charger finally ate it, over the winter.. considering a Noco10) to see how difficult it might be.

Lifted and 35's, with Rubicon fenders, might make it easier.. dunno.. will need to check it.

Truth be told, my liner is already damaged anyway, so might use it as an excuse to replace it. Have thought about aftermarket liners, but also know that would make the battery replacement even more of a pain.

Still hate the location of that thing, though.

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[Chasm]

I only drive mine about 600 miles a month, so it's not driven enough to keep the batteries charged.

Wait... how far do you need to drive to charge it? I drive it nearly daily and only get ~800 per month, mostly as ~20 miles each way to work on the interstate. I've never had that be a problem for a battery/charger before.

 

[ShadowsPapa]

Wait... how far do you need to drive to charge it? I drive it nearly daily and only get ~800 per month, mostly as ~20 miles each way to work on the interstate. I've never had that be a problem for a battery/charger before.

Have you checked your battery voltage with it sitting in the driveway, shut down after an hour or two?

 

[SaiintNick]

This has probably been answered, but what happens to the AUX battery if the ESS is turned of with Tazer and it never comes on? Is that when the battery finally craps out or is it because it's being used?

 

[Thunderspud]

This has probably been answered, but what happens to the AUX battery if the ESS is turned of with Tazer and it never comes on? Is that when the battery finally craps out or is it because it's being used?

The batteries (main and aux) are tied together in a parallel configuration. Using the Tazer to remember your previous setting of the ESS between starts isn't gonna do anything to accelerate or postpone a battery failure.

 

[ShadowsPapa]

This has probably been answered, but what happens to the AUX battery if the ESS is turned of with Tazer and it never comes on? Is that when the battery finally craps out or is it because it's being used?

Neither. Doesn't matter. IF it's going to go, it's going to go. If it's going to last, it will last. There's no real load on it either way. It's more of a buffer, a capacitor type of effect more than anything. it's only on its own at the exact time the starter kicks in.

 

[BlackRuby23]

I would do this, but my OCD doesn't allow me to make features on a vehicle not work, no matter how stupid those features are. It's almost enough to make me pay for that Connected Jeep crap. Almost.

I am sorta in the same boat, so prefer something that's easily reversible. I like the idea of pulling a ground cable and a fuse versus deleting all the wire and battery.

 

[Walter-new jeeper]

This start/stop function is the dumbest invention ever. It’s an over engineered, discombobulated, mess that does nothing to save gas and causes nothing but problems. I just didn’t realize how stupid it is untill I had to change the Aux battery. 3 years old 2022. Gladiator and had two Aux batteries replaced under warranty.
I had to leave work today because the wife couldn’t leave the house when the electronics went haywire. Service trans mission warning. Put car in park warning without the vehicle actually running. Oh yea… the car can’t shift from park because you can’t start the vehicle! Couldn’t turn off the vehicle from “RUN” to off. It was a mess. Every warning bell and light was going off. So now it’s time to replace #3
So I got a new aux battery. But removing the fuse box and trays was THE BIGGEST PAIN just to replace a battery. I couldn’t imagine what a dealership would charge.

just ranting a bit. lol.

I went through two and then put in a Genesis Dual Battery System. The aux battery typically went on the fritz during the wetter months (PNW) and the dealer told me the first time it was because of the bad design of the water draining from the plastic in front of the window through the battery tray. Well, when I was taking everything out I found the real culprit - something that would not have been seen if swapping the battery from the wheel well which is likely what the service department does. This was above the battery squeezed into the small space between the battery and the fuse box. No bite marks, just split wrapping and exposed wires.

 

[Blade1668]

Unless you are married to having a ESS function, just do the full delete mod and you can stop worrying about it.

I'm likely to be doing that as soon as I can stand up without crutches on mine. The damn service ESS system did a game on me, Thursday pushed started button, it did a half start and quit. I pushed button again it started and service ESS system was lit up.

as will the main if it goes first. And frankly, it's a wash - main can go first, or aux can go first. Or, if well cared for, neither will leave you stranded.
Gee, my wife had a main battery go bad on her WK2, and prevented it from starting or doing anything at all (that was 3 years in, and it would sit for a WEEK or more at a time, and I didn't take good care of it)
How about all of the 4xe owners who have the same exact issue - freaking out electronics, no start, can't jump and so on - oh, wait, they don't even have an aux battery! Hmmm, must be the MAIN battery going bad causing the problems.

People love to believe what they read by people who don't understand the system, though.

Bill,
I damn sure I can't say I understand it fully or at all and do still find as a added failure point, that I have had happen already. Now I'm 6-7 months past replacing both batteries, tow to dealership to un cluster #### it and replace fuse bar assembly. As noted in about comment.
Especially since right now I'm concerned that I may not be able to drive my Wrangler with manual transmission.

 

[Sandman 4x4]

Would doing this impact my warranty?

I’m not entirely sure, but that would give a dealer a very good reason to not warranty any electronics issues.

 

[ShadowsPapa]

I went through two and then put in a Genesis Dual Battery System. The aux battery typically went on the fritz during the wetter months (PNW) and the dealer told me the first time it was because of the bad design of the water draining from the plastic in front of the window through the battery tray. Well, when I was taking everything out I found the real culprit - something that would not have been seen if swapping the battery from the wheel well which is likely what the service department does. This was above the battery squeezed into the small space between the battery and the fuse box. No bite marks, just split wrapping and exposed wires.

For lurkers, onlookers and so on.......
A battery in water will not make it go bad.
Enough water such as making a path between the posts, can cause a slow discharge and it would discharge both over time, but not ruin.
A bare wire if not touching anything conductive is not good, but won't cause a bad or discharged battery. It would have to touch something conductive, such as metal

 

[Sandman 4x4]

It bugs me, too. On a 2024, you're probably under warranty and have roadside assistance from Jeep. I'm going to wait a while.

Oh yea I plan to let the warranty run its course. If I have no issues as I hope like every other new truck and car I’ve had, that I usually keep for a couple years after payoff, unless like only three different brands, Mercedes, VW and Geo Tracker that was actually a great little suv, but developed a fuse intermittently blow, that required the fuel pump in the tank to be replaced at $900! I just traded that away. Every other Chevy, Dodge & Jeep have been fine.

 

[ShadowsPapa]

do still find as a added failure point, that I have had happen already. Now I'm 6-7 months past replacing both batteries, tow to dealership to un cluster #### it and replace fuse bar assembly. As noted in about comment.
Especially since right now I'm concerned that I may not be able to drive my Wrangler with manual transmission.

Any added part like that is an added potential failure point. Yes. You have two added relays and an added battery.
Hootbro's method is the only one that gets rid of almost all of those added points.

 

[jmr]

The Cherokee KL has ESS with only 1 AGM battery why did Jeep not do this for JL/JT too? It would be like pulling fuse 42 and removing the aux battery ground cable. Maybe get a larger main battery to be safe.

 

[Chasm]

The Cherokee KL has ESS with only 1 AGM battery why did Jeep not do this for JL/JT too? It would be like pulling fuse 42 and removing the aux battery ground cable. Maybe get a larger main battery to be safe.

That's been my thought since I've started reading all these horror stories.
If they're in parallel, not isolated from each other, what's the point?

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