Deleting Aux Battery

[Hadders]

I've just done this on my 2024 Rubicon 9400miles, I haven't changed the main battery yet but thinking the Aux one was drawing down the main one. Symptoms: first start of the day would fail on the initial button press (like you hadn't pressed the brake) with the screen resetting, started on the second press fine. During normal driving, when the ESS kicked in, the restart would drop into neutral. Another weird thing was the alarm would go off when driving along, no flashing lights and no way to stop it, even stopping, turning off, lock/unlock etc. Hoping this was a battery thing?!?! Point to note on this 2024 (UK spec) the negative battery terminal for the body didn't have the stud attachment, that was on the other cable.

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[Terpsmandan]

'22 JLURD. Which cable is the one to disconnect? I ask because both cables disappear into the harness next to the battery. Is it the cable with or without the Intelligent Battery Sensor?

 

[Monster118]

'22 JLURD. Which cable is the one to disconnect? I ask because both cables disappear into the harness next to the battery. Is it the cable with or without the Intelligent Battery Sensor?

For me it was the cable that had the extra post to accommodate the second cable. The one that sat on the extra post is the main ground.

 

[Terpsmandan]

Thanks. Reason I am asking is that I thought I read that Stellantis changed the position of the cables and like I said, both cables go into the harness.

 

[THAW]

Thanks. Reason I am asking is that I thought I read that Stellantis changed the position of the cables and like I said, both cables go into the harness.

It's always the smaller gauge cable.

 

[AndySpill]

It's always the smaller gauge cable.

It's always the smaller gauge factory cable. As covered above in a post I like to point this out for the owner whose added some accessory whose cable is smaller than either of the two factory ones (which often is the case when accessories are added, which is far from rare) leading to the body ground or Aux battery negative, has long forgotten having done so, and pulls this cable wrongly thinking they've disconnected the Aux battery.

A certain member's (not who I'm responding to here) laugh icon below, and no commentary shall be the signature equivalent of his agreement that this is a valid point.

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