No auxiliary battery

[TheNewGuy]

So I had this exact issue. Went through the whole process to find I don’t have an auxiliary battery(happy about this).
definitely not an aux under the rear seat and I do not have etorque engine. Have 2019 wrangler 2L turbo rubicon and 40,000 miles. Replaced main battery and all is great. Again, glad I don’t have the auxiliary but if I add some additional accessories I have a place to put a battery although a pain to get to. And now the question is why don’t I or original poster have the auxiliary battery?

Pretty sure the 2019 2.0L had eTorque. The aux battery isnt under the rear seat, it's under the hood. The eTorque 48v battery is on the underside of the JL in the rear seat area

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[mwilk012]

There are hundreds of reasons that ESS can stop working. Some of them are normal. Most of them are bad. Do you have the @ Warning light on the cluster? If so, scroll to the ESS page using the up or down arrows on the left side of the steering wheel. See what it says.

Do you have any other active warning lights?

 

[scottijohn63]

I have the 2.0 e torque, and just bought a new 12v battery. Is there anything special I need to do when replacing the 12v?

 

[mwilk012]

I have the 2.0 e torque, and just bought a new 12v battery. Is there anything special I need to do when replacing the 12v?

no. The 48v to 12v converter requires 12 power input to work. As soon as you disconnect the main battery, it’s dead.

 

[scottijohn63]

no. The 48v to 12v converter requires 12 power input to work. As soon as you disconnect the main battery, it’s dead.

Thanks so much!

 

[scottijohn63]

no. The 48v to 12v converter requires 12 power input to work. As soon as you disconnect the main battery, it’s dead.

Replaced battery and restored my ESS. Thanks!

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