Replaced Main Battery Today

[Chorndawg32]

Went out this AM to a dead battery. Jumped it, went to Advance Auto to have them check the battery ( original 2020) Tested bad, so I replaced with new. ESS(Start/Stop now has to be turned off at every engine start-not really a problem) However, after the battery change dash was showing 14.2-14.3V earlier today. Tonite showing 12.4-13.6V. Any ideas? Thanks in advance!

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[Lost1wing]

I would suggest starting over by disconnecting the negative at the fender. Then I would take both cables off the negative of the main battery. Unplug the IBS at the negative of the main battery. Charge the aux battery by placing the positive clamp on the main battery positive terminal and the negative clamp of the charger to one of the removed cables that goes to the aux battery. The other one goes to the fender ground point so be sure to verify the correct cable. Make sure you are using an AGM battery charger. When it is finished charging, move the negative charger clamp to the new, main battery negative post not the plate that the IBS is mounted on. Wait for it to finish charging. While waiting, put a meter on the aux battery cables. Many suspect it will be bad in your situation, as it will not hold a full charge. It is possible to still see a full charge but you won't know it's capacity without a load test. If you are satisfied with your aux battery or you decide to replace it, be sure to charge it before installing. You want to start with both batteries fully charged.

Hook up both battery cables in the reverse order. Plug the connector back into the IBS. Connect the fender ground.

Knowing the state of your aux battery could point to your problem. Installing a new main with an old aux could also be a potential problem, not to an IBS reset wasn't accomplished.

 

[sharpsicle]

Went out this AM to a dead battery. Jumped it, went to Advance Auto to have them check the battery ( original 2020) Tested bad, so I replaced with new. ESS(Start/Stop now has to be turned off at every engine start-not really a problem) However, after the battery change dash was showing 14.2-14.3V earlier today. Tonite showing 12.4-13.6V. Any ideas? Thanks in advance!

Charging voltage will change based on SOC of the battery. This looks normal to me for a healthy system.

 

[TestMule]

You may just need to repeat the initial settings for the Smart Start/Stop module to work properly.

 

[Chorndawg32]

You may just need to repeat the initial settings for the Smart Start/Stop module to work properly.

Thank you.

Charging voltage will change based on SOC of the battery. This looks normal to me for a healthy system.

Thanks

 

[Chorndawg32]

I would suggest starting over by disconnecting the negative at the fender. Then I would take both cables off the negative of the main battery. Unplug the IBS at the negative of the main battery. Charge the aux battery by placing the positive clamp on the main battery positive terminal and the negative clamp of the charger to one of the removed cables that goes to the aux battery. The other one goes to the fender ground point so be sure to verify the correct cable. Make sure you are using an AGM battery charger. When it is finished charging, move the negative charger clamp to the new, main battery negative post not the plate that the IBS is mounted on. Wait for it to finish charging. While waiting, put a meter on the aux battery cables. Many suspect it will be bad in your situation, as it will not hold a full charge. It is possible to still see a full charge but you won't know it's capacity without a load test. If you are satisfied with your aux battery or you decide to replace it, be sure to charge it before installing. You want to start with both batteries fully charged.

Hook up both battery cables in the reverse order. Plug the connector back into the IBS. Connect the fender ground.

Knowing the state of your aux battery could point to your problem. Installing a new main with an old aux could also be a potential problem, not to an IBS reset wasn't accomplished.

Thanks!

Charging voltage will change based on SOC of the battery. This looks normal to me for a healthy system.

 

[Chorndawg32]

T

You may just need to repeat the initial settings for the Smart Start/Stop module to work properly.

Thanks!

 

[Jeeper479]

I assume it is charging less because the new battery? That's at least what my assumption was when I recently replaced my battery.

 

[Chorndawg32]

Thanks. It appears to be running fine now. I did lift the neutral connection for the 2nd battery & removed the fuse for the ESS too. Also ordered an automatic start/stop add on, so that the Jeep would remember to keep it turned off.

 

[Lost1wing]

My Gladiator must have been watching my type on this thread. The Gladiator was parked for a week and when I went for a ride yesterday, I finally saw the battery charging message. It changed to Ready after 20 minutrs of driving. For the past several months, as soon as the engine warmed up it was ready.

I now have the NOCO Genesis 2D under the hood. I plugged it in at 4pm and by 8pm, the battery was fully charged. It was one year ago that I first started noticing stop start behavior on the Gladiator. Knowing a little bit on how it works can save you a lot of grief and money.

The StopStart page can give you a clue , however many don't know about it or how to use the information it is telling you. Some might just see the battery charging message and replace the batteries. Sometimes, you will notice more issues arise after a battery change. This is when precautions are not taken to isolate the battery terminals.

ESS gets the blame.

 

[TexasOverlander]

My 2021 just disabled the aux switches after sitting for a couple weeks. Cranked and drove 10 minutes, still disabled. After sitting a while, tested voltage and was @ 10V while off.Going to hook up a charger today.
Is there a special way to hook up the charger due to the aux battery? I know I sa a video on jumpstarting from post 1 under the fuse cover? Is this required for hooking up a charger without having to remove bolts and grounds?

 

[Lost1wing]

Use an AGM charger and just connect the positive charger lead to the positive terminal of the main battery and connect the negative lead to the negative bracket at the main battery. Do not connect it under the plate to the battery post. The IBS will not see the charge the correct way. Both batteries will be charged this way. 10v doesn't look good. Maybe it can recover?

 

[Lost1wing]

Jump starting or jumping terminals to start with the good battery the wrong way can wipe out your fuse array or worse. I would not do any youtube trick unless YOU know what your are doing and the possibility of error and the consequences of the error.

 

[Lost1wing]

My 2021 just disabled the aux switches after sitting for a couple weeks. Cranked and drove 10 minutes, still disabled. After sitting a while, tested voltage and was @ 10V while off.Going to hook up a charger today.
Is there a special way to hook up the charger due to the aux battery? I know I sa a video on jumpstarting from post 1 under the fuse cover? Is this required for hooking up a charger without having to remove bolts and grounds?

What is your message on the ess page? Any other symbols?

 

[TexasOverlander]

Thanks for your replies. The you tube video was from a pretty reliable source, but not sure how it works.
https://www.facebook.com/reel/130410090068938

My aux switches stopped working and the screen says they are disabled due to battery charging. Sounds like it may resolve after driving a while, but cannot get out today, so decide to charge.

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