Jeep 2.0 With BSG and ESS not working

[Doubleaaron]

Just went thru this. Battery charger helped for a few months. Took it to dealer, they would not replace it until it was toast. (Still a few months left on 3 yr warranty). my battery died last week, Jeep completely dead, error lights flashing. Just bought a battery out of pocket, didn’t want to deal with a tow to the dealer and it sitting for a few weeks to replace it.

think about getting it replaced, don’t want to end up stranded
Same setup 2019 JLUR, 2.0 with e-torque

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[BallisticBurrito]

The main battery still has to be charged for ESS to work. The likelihood of the absolute garbage main battery failing is much higher than the 48V battery.

Have you checked voltage of your main battery at all?

Yes. Even hooked it to an automatic tender that alerts when it's a bad battery, etc.

 

[Strommen95]

What is the best main battery to buy to replace the OEM? Is the AGM style better than the regular lead acid for the 2L Turbo.

I don't have a 2.0, but I'm almost certain every battery for any JL has to be AGM.

 

[mwilk012]

Yes. Even hooked it to an automatic tender that alerts when it's a bad battery, etc.

Did you remove the battery or at least disconnect it before testing?

 

[four low]

A battery can test the correct volts at rest ; it has to be load tested to show bad cell, low voltage under load.

 

[BallisticBurrito]

A battery can test the correct volts at rest ; it has to be load tested to show bad cell, low voltage under load.

Just slapped my schumacher load tester on it and it was fine. Though I admit this was with the 48v battery still hooked to it.

I'll test it tomorrow with it disconnected because it'll be above freezing. The load tester makes a nice hand warmer, though.

 

[BallisticBurrito]

What is the best main battery to buy to replace the OEM? Is the AGM style better than the regular lead acid for the 2L Turbo.

ALSO can we install the dual battery setup with the e-torque 48v battery / BSG configuration (non ESS)???

I just pulled up the felt cover on my 12v battery on my 2.0 etorque and it's an AGM. Which I understand because they can handle being bounced around more than a normal lead acid but ffffff they're pricier.

 

[VKSheridan]

Just slapped my schumacher load tester on it and it was fine. Though I admit this was with the 48v battery still hooked to it.

I'll test it tomorrow with it disconnected because it'll be above freezing. The load tester makes a nice hand warmer, though.

Gotta isolate the bro. If not, the results can sometimes punk ya…..
Don‘t forget to put a wrench to all the battery terminal connections and push the fuses, they lie too. Good luck!

 

[BallisticBurrito]

This is what I'm getting under the load test. It goes here and stays steady for as long as I'm testing then goes back up to around 12.2 volts resting.

48v disconnected.

 

[mwilk012]

This is what I'm getting under the load test. It goes here and stays steady for as long as I'm testing then goes back up to around 12.2 volts resting.

48v disconnected.

12.2 resting is nearly dead.

 

[BallisticBurrito]

12.2 resting is nearly dead.

From google-fu 12.2 is around 50% charged.

Hooked it to the charger for almost an hour and it's still going.

 

[mwilk012]

For a 12v battery?

Yes. The nominal “12v” is a pretty bad descriptor. It’s a 12.6V battery. 6 2.1V cells.

 

[BallisticBurrito]

Yes. The nominal “12v” is a pretty bad descriptor. It’s a 12.6V battery. 6 2.1V cells.

I googlefu'd and edited it with a picture of the charger it's been hooked up to for around an hour. Looks like it was pretty low.

 

[mwilk012]

I googlefu'd and edited it with a picture of the charger it's been hooked up to for around an hour. Looks like it was pretty low.

What kind of charger? Does it have an “AGM” setting?

 

[BallisticBurrito]

What kind of charger? Does it have an “AGM” setting?

Yes it's set to 12v AGM.

https://www.harborfreight.com/4-amp...ntrolled-battery-chargermaintainer-63350.html

I normally use it to keep my motorcycle battery from shitting the bed during winter.

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