[ModernRocketry]

I'm looking for advice about a dual battery setup for my 2022 Rubicon 4xe.

Backstory: I am experiencing a charging fault with my Jeep at the present time. I took the Jeep to the dealer and they said they would not diagnose/repair it until I have disconnected all the accessories I have added to my Jeep.
I have a winch, powered side steps, and a switch system to power all my lights, gmrs radio, etc.
Fault code in the IDCM is P0CF3-00 Described as: Control Pilot Circuit Open

I talked with them and told them how annoying this was, and they were sympathetic.

The service advisor mentioned seeing Jeeps come in for service with a dual battery system, where the accessories were attached to a second battery and there was some type.of manual switch they could be shut off to isolate the primary battery from the accessory battery. I've done some googling and the only thing I can find is the Genesis system, but this does not seem to match his description.

I'm tired of fighting with the dealer, and want to install something where I can easily switch/isolate the main battery, removing all my accessories from the system.

Anyone know of such a system?

 

[Rocksmith]

Don't know of many that specifically state they work with 4xe but any that work with the 2.0 might work.

GEN3 JL Gas Dual Battery Kit | Genesis Offroad

 

[Rocksmith]

HV battery charging fault will probably be unaffected by any 12v battery mods.

 

[Tyler-98-W68]

Sounds pretty normal, you have a bunch of aftermarket 12v stuff wired in and are having issues, even though they aren't related to the HV charging issues, they can/will say its related.

I'd never go through the cost/complexity of a dual battery system on the 4xe when a single high quality battery can be used and topped up with the HV battery.

What you need is to wire everything to a battery isolator if you want, but to be honest you shouldn't have to because that isn't the reason you are having a charging system failure.

Does your 12v battery go dead on you at all, is it stock?

 

[Yawnie'sPapa]

And people wonder why I bother with terminal strips. In 5 minutes I can disconnect almost everything electrical that I have installed.
A dealer tried to tell me my winch was draining the batteries on my GLADIATOR - but they ignored the big freakin' red switch with the word OFF in plain English letters. Off means off, guys, it pulls nothing. when that switch says OFF.
Their fix was to move the ground cable from the top of the IBS on the main crank battery over to the body ground stud (again, not a 4xe)

Too many dealerships just don't have people qualified to work on electric anything.

Power steps do, for some weird reason, have a constant draw and I don't get the why of that. Magnetic switches operate them - why do they need constant power when the thing sits in a garage, engine OFF, big round switch OFF.

I guess most techs don't get it - when the lights are off, when the winch cut-off switch is off, then it's not doing anything to anything.

 

[ModernRocketry]

My 12v main was replaced about 2 months ago... because Jeep OEM batteries are crap.
The symptoms were very different and left the Jeep DOA.

I agree that most techs are... silly (kind words)
One recently told me that the wheel sensors could detect my 37 inch tires without the wheel spinning. I explained to him that I was an Engineer and have a good understanding of how wheel sensors work and he was incorrect. He held his position. I left running. Fixed the issue myself.

With that said, this is intriguing: Dynatrac ProSwitch™ Battery Disconnect Switch and Auxiliary Panel

Anyone have this system installed?

 

[leeloo]

During warranty, I prefer not to mess with the electrical system. I know they will try anything to refuse to fix it.
I got one of those things called solar generators( they don't generate shit, not sure why they are called like this ) and I power my fridge, laptops, phones while camping.
Install a big OFF switch for the winch, and wire you aux lights and radio using the Aux buttons provided by Jeep for this purpose. Like this they can't say anything..

 

[ModernRocketry]

@leeloo cool name!!! I am thinking about doing exactly what you said. I created a plan to combine some of my offroad lights ( I have lots! ) and other accessories then confirmed the amp draw are within spec of the switches. If I go forward with this plan, the only direct-to-battery items would be my side steps and winch. in the mean time, I am disconnecting everything to get this fault reset.

 

[ajdavidson5]

My 12v main was replaced about 2 months ago... because Jeep OEM batteries are crap.
The symptoms were very different and left the Jeep DOA.

I agree that most techs are... silly (kind words)
One recently told me that the wheel sensors could detect my 37 inch tires without the wheel spinning. I explained to him that I was an Engineer and have a good understanding of how wheel sensors work and he was incorrect. He held his position. I left running. Fixed the issue myself.

With that said, this is intriguing: Dynatrac ProSwitch™ Battery Disconnect Switch and Auxiliary Panel

Anyone have this system installed?

Interesting. Would definitely try this. But wow. $500 for a battery disconnect like this is steep.

 

[Allan_B]

They can ask you to disconnect because you are asking them to diagnose their system, that said, I would just disconnect it and leave it that way until they admit there is a problem and fix it. No way I would spend that much time and energy, (pardon the pun) changing everything just for these fools to test.

A good dealer will diagnose it anyway. Your dealer apparently does not fall into this category. Keep looking for another.

 

[ModernRocketry]

Follow-up and closing out this thread.
I have not been able to find a dual battery setup that meets what the dealer described. I bought some very nice IP67 10AWG connectors and will wire my accessories into the existing AUX switches, and remove my.aftermarket switch system. Should I need to "disconnect" everything in the future, 4 plugs, no tools. The only accessories hard wired to the battery will be the winch.

The issue that I described - fault code and wouldn't charge - was fixed by replacing the IDCM. The dealer had the vehicle for a week to make the necessary repairs. I asked if the IDCM module had a revision number, dealer did not know.The Jeep has had the ZB7 recall completed approximately 1 month before the IDCM module failed.

For those suffering similar issues: 2022 Rubicon with 8000 miles, build date August 2022. Daily driver, mostly electric with 4 hard offroading trips to the desert under his belt to date. Repairs have been: new 12v battery three months prior and ZB7 recall 1 month prior.

 

[ModernRocketry]

I forgot to mention, the Jeep IDCM issue caused my JuiceBox 40amp 240v charger to trip a 50 amp breaker on a dedicated circuit. Thought that was "interesting"