Another ESS/Battery Question

[Panthers65]

Reading this shematic I believe my 2022 diesel falls into the new version and the Aux battery is the main plate over the IBS. You can't just remove this terminal without relocating the wires on the wing. Correct?
Small wire is Aux wire and the larger wire on the wing is the body ground??

They changed it mid-2021, I don't think it's engine specific, all mid 2021s and later got the switch. My late 2021 has it.

The smaller diameter wire runs to the larger "L-Shaped" terminal. To delete the aux battery, you have to pull F42, and then remove the terminal with the smaller diameter wire, then isolate this terminal so it can't touch metal and ground itself again.

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[SaplingT]

If I remove the L shaped terminal it leaves me a tiny 10 mm stud to attach the larger grounds to on top of the IBS. I will need to order a terminal block to attach there and then attach my other wires to get that done.

 

[Mr._Bill]

If I remove the L shaped terminal it leaves me a tiny 10 mm stud to attach the larger grounds to on top of the IBS. I will need to order a terminal block to attach there and then attach my other wires to get that done.

You don't remove the terminal or plate. Just undo the nut and remove the cable. You will then have a post and nut available if you want to attach other items.

 

[SaplingT]

On mine the cable end of the small wire is the plate. It doesn't detach.

 

[Mr._Bill]

On mine the cable end of the small wire is the plate. It doesn't detach.

If that is the cable going to the Aux battery, then just leave it in place. Remove the Aux battery and insulate the connectors inside the battery box.

Personally, I see no advantage to removing the Aux battery. Just change them when needed (about every three years), and watch for signs of battery issues (ESS or Aux Switches unavailable warnings). The Aux battery is more likely to outlast the Main battery. The odds of being stranded by a battery failure are very slim, if you pay attention to the vehicle. There are rare occasions of odd behavior, and less rare occasions of defective batteries, but the tales of being stranded by a bad Aux battery are blown way out of proportion by the internet.

 

[Jeeperjamie]

If that is the cable going to the Aux battery, then just leave it in place. Remove the Aux battery and insulate the connectors inside the battery box.

Personally, I see no advantage to removing the Aux battery. Just change them when needed (about every three years), and watch for signs of battery issues (ESS or Aux Switches unavailable warnings). The Aux battery is more likely to outlast the Main battery. The odds of being stranded by a battery failure are very slim, if you pay attention to the vehicle. There are rare occasions of odd behavior, and less rare occasions of defective batteries, but the tales of being stranded by a bad Aux battery are blown way out of proportion by the internet.

^this x2

 

[ShadowsPapa]

The cable marked 2020 is the aux battery ground cable for that year.
The cable marked 2021+ is the aux battery ground cable for later years.
Stud size doesn't matter unless it's a Kentucky Derby contender.

You can remove the cable with the plate on the end with the large stud and put the other cable back directly onto the IBS. The only time that small stud on the IBS is in cases where you run a winch ground cable back to the battery via the top of the IBS. Otherwise all other things can be grounded at the fender ground studs next to the battery. No need to go directly to the IBS on the battery. The cable from the battery goes to the chassis and engine anyway. A winch is the only reason I'd go directly.
All of my other accessories ground on the ground studs on the fender area.

In many cases, where people say "but I wasn't able to jump start it" is because they slap cables on and instantly hop in and try to start it.......... heck, that method hasn't worked well for decades. Be patient, keep the RPM up on the donor vehicle, let the donor charge the dead/low battery/batteries for a bit, THEN try it after voltage has built up. Even my 1982 car with a dead battery had to sit a couple of minutes with jumper cables on it before it would start.

As far as batteries - will say it again on this 150th thread on aux batteries -
it's a common issue with batteries these days that they don't last like they used to.
I talked with people - customers in a NAPA store - who were complaining they couldn't get modern batteries in modern cars to go over 4 years. Some saying they were lucky to get even that. Ironic because I happened to be there for a new battery because my 4 year old NAPA battery from my car had gone south and wouldn't hold a charge.
The other issue is that the batteries in these Jeeps - how the Jeeps are being driven, they aren't being charged fully. They sit, they discharge via the electronics in the vehicle, then they are driven for 20 minutes to work. That's not even a little bit of charge. Do that every week for a couple of months and now you have a battery that's constantly cycled down, never fully charged and it won't be fully charged - life cut short.
20-30 minutes won't charge a battery that's been sitting in a modern vehicle for 2 or 3 days.
So it's not just batteries, it's how they get used today.

 

[SaplingT]

It is my winch ground that I am concerned about. Should I try to get that directly to the battery and bypass the top of the IBS? Even if I use a terminal block? I've had it on the 12mm stud for awhile.

 

[Mr._Bill]

It is my winch ground that I am concerned about. Should I try to get that directly to the battery and bypass the top of the IBS? Even if I use a terminal block? I've had it on the 12mm stud for awhile.

No, do not bypass the IBS. It is an essential component of the 'smart' electrical system. If it is unable to accurately monitor battery flow, it makes poor decisions that lead to electrical system issues.

 

[ShadowsPapa]

No, do not bypass the IBS. It is an essential component of the 'smart' electrical system. If it is unable to accurately monitor battery flow, it makes poor decisions that lead to electrical system issues.

What he said ↑↑↑↑

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