battery

  1. New Hampshire Sold: Upgraded 700CCA Battery Removed from 2021 Rubicon 4xe

    I pulled this out of my Rubicon with less than 1,000 miles. Replaced with the Genesis Dual Battery kit for running fridge and other accessories while camping. This is the upgraded battery that comes with the factory tow package: 75 amp hour, sealed AGM, 700 cold cranking amps. Seems to fit a...
  2. Do you really need a dual battery system if running multiple auxiliary lights/light bars?

    I am planning on getting the VO Switch JL100 switch system with 8 switches. I want to connect 2 KC slimlite led’s, a 30 inch light bar, and eventually I am going to get Baja designs lp6 (two of them) and the Baja designs sae fog lights for road use. And I might get some other lights in the...
  3. The famous aux battery failure with a twist 3.6

    So after reading and reading I decided to make my own post to see if anyone is expierencing the same problem as I am. The events: - 1 month ago my car failed to restart from start stop feature at a red light. Was able to jump and go about my day, continued volt watching on dash - 2 nights ago...
  4. Part number for JLU Sahara 2.2 diesel battery?

    attempting to replace my battery as the one that came with it was sat for a while and is now useless. dealer is being very stingy with the part number for it and I am not able to get it from them. does anyone have a part number for it? My car is a 2019 Sahara JLU 2.2 Multijet Diesel with the...
  5. What are People Replacing Their Aux and Main with?

    Hey all, I recently got a service start stop message on my dash and found out my aux had gone bad after I isolated and tested it. I think im going to replace both because I’ve heard people saying once one goes bad the other one will soon follow because they are in series. So, I’ve been throwing...
  6. Why does the front display suddenly show my battery and voltage?

    I have a 2020 Jeep Sahara and only have had it 6 weeks. Suddenly, the display is showing a battery icon and voltage, which goes up to 14.2 or 14.3. Did I accidentally select something?? Or is something wrong? Because there is also a notification beep/ding.
  7. LiFePO4 Battery? 12V 100Ah

    Any easy way to REPLACE the OEM Jeep JL Battery with a LiFePO4 12v 100ah battery to a jeeps 12v system without damaging the alternator? I found 12V 100Ah LiFePO4 Lithium Deep Cycle Battery, Rechargeable Lithium Iron Phosphate Battery, Built-in 100A BMS, Perfect for RV, Solar Power, Home Energy...
  8. Disconnecting Battery/s to Install LED Headlamps?

    I am about to swap out my factory halogen headlamps and fog lamps with the Mopar/OEM LED's. My Wrangler is a '21 with the 4th wire, so no need to run the additional supplied harness or fuss with the fuse box, BCM, etc. They are supposedly (really) plug n' play, then a quick trip to the dealer...
  9. Voswitch killed battery I think

    So on saturday I installed a Voswitch jl200, now I am not very good with electrical stuff like that , but I installed it exactly how the instructions said and how videos showed. On Sunday I was driving and the ESS system wasn’t kicking in, I woke up today for work and the Jeep wouldn’t start or...
  10. Mapping the Battery Cables

    I am trying to isolate my Aux battery so that I can separately charge it to determine if it needs replacement. I do not know which cable is which and could not find the info in the forums. Can anyone identify the six cables? Thanks.
  11. SOLVED - No volts on interior battery wire (aux switch bank)

    Resolved- fuse F72 goes to that wire. Fuse box specifies 30 amp fuse and there was a 10 amp fuse there instead. replaced with a spare 25 amp and everything is working now! Does anyone know why I may have no volts on the red/white wire under the passenger side dash? It worked a couple months...
  12. 100% Battery Range

    Hey all, I have been pleasantly surprised with the amount of range I've had in EV mode. I've had total range estimates that far exceed the EPA 21 Mile estimate. I've seen 25, 28, 30, and this morning I saw 32 miles at 100% charge. Pretty incredible! Does anybody know if it calculates range...
  13. My ESS has more excuses than my 8 year old

    The system previously threw warnings to service the ESS. Taken to the dealer under warranty and they did a software update. It no longer tells me to service the system but has not worked once since the update. It seems it has a full list of excuses of why it is not working instead. I really...
  14. Tazer JL & Mopar AUX Switch/ESS Issue

    Hey everyone, I have a rather strange issue that I have not seen elsewhere on the forum that I am hoping someone can help with. I just installed the Mopar AUX switch kit in my 2019 JLU and I used the Tazer JL (version 11.1.5) to enable the switches in the Uconnect menu. Double checked my work...
  15. "Aux switches temporarily unavailable while battery charging"

    I went to start up my 2018 JLU Sport S the other day and got a message on the dash that said "Aux switches temporarily unavailable while battery charging". I only have 2 things connected to my Aux switches and neither were on, so I thought it was weird. I flipped through the vehicle info pages...
  16. Charging Issues

    My 2020 wrangler unlimited rubicon started giving me a warning today concerning the charging system. The icons on the dashes were a red battery on the left and start/stop malfunction on the right. I realize that the start/stop system will not work if the battery is low. The voltage started off...
  17. 3.6L ESS Bad Aux Battery No Start Firmware Fix

    When my 2018 JLU was at the dealers for the steering stabilizer recall, I asked about updating the radio firmware to fix some issues I was having (5" radio). They updated the PCM, ABS and radio firmware. Yesterday I noticed the low speed surging was gone, so today I tested starting with aux...
  18. Is a supplemental/ESS/aux battery jumpstart dangerous?

    A few days ago a picture was posted on another thread (https://www.jlwranglerforums.com/forum/threads/quirks-not-addressed-in-user-guide.40684/page-6#post-922367) that showed a jump start related addendum to the owners manual that states "Only use the positive battery post on the main battery...
  19. Check your nuts - battery terminal nuts, that is

    I just got a new '19 JLUR at the beginning of September, and installed a winch a couple weeks ago. While I was installing the winch, I was surprised at how easy it was to loosen the negative battery terminal auxiliary post nut. So I checked them all the nuts on the battery connections. None of...
  20. ESS Battery Underhood and Management Diagram

    This new diagram is based on the appearance and location of the different components under the hood. I'm open to suggestions that would help with the readability/usability. For those that aren't aware, there are several 3.6L ESS threads in the 3.6L Engine forum if you're looking for more ESS...
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