Jeep jl second battery location

Jerry Bransford. 50612 posts · Joined 2005. #2 · Feb 8, 2018. I haven't seen a kit since that driver's side tray not set up for a battery, it's there for the ABS pump assembly. You'll want to figure out how to mount the battery temperature sender under the battery too, that's how the computer knows when to slow the charge rate.

Aug 7, 2023 ... Comments31 ; Jeep Compass Auxiliary Battery Replacement. MotorCity Mechanic · 164K views ; What You Might Not Know About the Jeep JL Aux Battery.How to replace both your stop star battery and main battery, in your Jeep Wrangler JL. We go through step-by-step how to remove both batteries and change you...Replacing your Jeep Auxiliary Battery. Sponsored . Reactions: MikeInMo, Flhryder, mog and 5 others. ShadowsPapa Well-Known Member. First Name Bill Joined Oct 12, 2019 Threads 180 Messages 29,608 Reaction score 35,219 Location Runnells, Iowa Vehicle(s) '22 JTO, '23 JLU, '82 SX4, '73 P. Cardin Javelin Occupation Retired auto mechanic, frmr gov't ...After ESS ceased working, dealer warranty replaced main battery at (nearly) exactly 3 years after build date. (Jeep at sat on lot for ~ 1/2 year before I bought it w/ 28 miles; guess a stripped MT Rubicon wasn't popular ). Aux battery still seems ok now 5+ years after build. Probably getting close.May 11, 2021 · 20770 posts · Joined 2013. #2 · May 11, 2021. A independent diode isolated deep cycle battery like used in tow behind trailers that can charge while driving and from solar sounds like what you want. Sent from my iPhone using Tapatalk. Like. Jerry Bransford. 50633 posts · Joined 2005. #3 · May 11, 2021.

13.8-14.2v isn't from the battery. It's from the alternator trying to charge the batteries. Now that you have better batteries the alternator isn't always trying to charge them. 12.7-12.9v is a fully charged battery. So the alternator doesn't kick in and voltage will stay 12.7-12.9v. 12.2-12.5v is a slightly drained battery. So the alternator will kick in and …When you need to locate a dealer that sells or services Jeep vehicles, there are a few ways to find one. You can search through the Jeep website, a partner website, online sources ...Negative Terminal Location: Top Left FrontPositive Terminal Location: Top Right FrontCold Cranking Amperage: 720ALength: 10 ... Width: 6.875in. About 2019 Jeep Wrangler Car Battery. Your Jeep's battery stores electrical energy that the starter needs to fire up the engine, and it's also used to power electrical systems when the engine is off. ...I need the following: A box that fits a Optima DH6 AGM battery (11x7x8H) Plug in jumper cable (fast connect) to jump my Jeep when it fails Connections to Warn Winch Trickle charge both the jeep battery (AGM) via solar and or off grid battery (AGM) >10amp Monitor and automatically charge both engine and off grid AGM batteries, detect when engine ...United Nations Location Code. ES MAD. Open Location Code. 8CGRFCWQ+26. Open­Street­Map ID. way 167025457. Open­Street­Map Feature. aeroway=­aerodrome. Geo­Names ID. 6299345. Wiki­data ID. Q166276. Thanks for contributing to our open data sources. This page is based on OpenStreetMap, GeoNames, Wikidata, Wikimedia Commons and Wikivoyage.That is just it, I am not sure. i THOUGHT it did have the little battery but then got conflicting answers. HERE; Q: I have a 2019 JLUR with 2.0. Is there a small second battery that I have to remove to install your 2 battery system? Asked by: The Old Troll - 11/23/2020 A: The 2.0L engine does not have a small aux battery like the 3.6L does. You ...

Prior to getting my backseat issue resolved I had battery issues. The charging system was working and pushing out 14v but my battery(-ies) were not doing well. The mechanic mentioned the possibility of bad cells. So yesterday I had both batteries replaced. On the way home, I wanted to see how the battery health and charging were on the dash ...To prevent this, some Jeeps are made with two separate batteries that help to share the power load more evenly. One focuses on driving functions, while the other focuses on accessors like the radio, lights, and more. This ensures everything functions optimally within the Jeep in addition to promoting battery longevity.Location IA Vehicle(s) 2018 Wrangler JL 2019 Cherokee KL 2020 Gladiator JT Mar 7, 2022 #5 ... My thought is that this will totally eliminate any chance of the 2nd battery damaging the main batt as well as permanently eliminate the start/stop feature. The only down side would be the warning message on startup and the Avengers symbol above the ...Aug 7, 2023 ... Comments31 ; Jeep Compass Auxiliary Battery Replacement. MotorCity Mechanic · 164K views ; What You Might Not Know About the Jeep JL Aux Battery.Smart alternators won't generate sufficient charge voltage under normal conditions. Battery capacity is reserved and charge is dumped to the battery during braking under alternator control. This is don't for fuel efficiency. To sufficiently charge a house battery a DC to DC converter needs to be used. Something like offered by Redarc or Sterling.

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e torque is a 48v liquid cooled battery pack located under the jeep. This controls ESS electronic start/stop as there is no alternator. These vehicles have a belt start generator that provides the initial ( and I mean fraction of a second) turn of the wheels before the engine kicks on.The location “is in mountainous terrain close to the border with China, so it is difficult for the US to hit it with a preemptive strike." When North Korea launched its second inte... The Jeep JL and JT have Aux batteries. Yep, you heard me correctly, there are two batteries. One for starting the engine and the other is used to keep thin... Here's the underside of the PDC cover showing the description and location of the fuse. ... in Paint. 12/6/21 - JB or JJ - at Body Vendor 12/13/21 - per Jeep Chat - its in Transit with an ETA of 12/20 to 12/27. 1/4/22 - Delivered To Gupton!!! 1/9/22 - Picked it ... The problem is that all battery issues get lumped together and blamed on the ...Location Texas Vehicle(s) 2013 JKU DD, 2015 JKUR sad loss, 2018 JLUR DD ... Extra time off the grid if you camp out of your jeep, without risking a depleted cranking battery. ... is now also a full size high cap battery, the start relay is powered through the 2nd battery, thats what leaves you stranded when the lawnmower battery dies. #FJB ...

3 different ways to get to the Auxiliary Battery on the JL Wranglers….taking out the fuse box/power distribution center, removing the fender liner or removin...The jeeps have two batteries present inside their hood. The two batteries are connected to the car by all means but serve differently. The system designates one battery for cranking, and the other battery for the accessories. One of the two batteries is the primary battery. This battery serves the purpose of cranking the truck.I'm assuming that you are talking about the 3.6L JL. For reference ESS battery=aux battery=supplemental battery; they're all one and the same. Some people have suggested--and I think them purists--that because the 2 batteries are of different types that it's best to charge them separately. But I don't think your rig does, so why should you?5/16" ring, 12-10ga. 3/8" ring, 12-10ga. Jeep Wrangler JL/JLU Dual Battery System fits the 3.0 Diesel and 392 Gas versions. This kit is designed to allow for 2 full size batteries to be installed. The Combiner monitors use and allows the batteries to link together to provide power for starting if they are drained.Your dealer is an asshat. first, raise holy hell with the service manager and then the GM and then find the ownership group and raise holy hell with them second, get with JeepCares third, call FCA and tell them what your dealer has done. fourth, never, ever, ever, go back to that dealer and, assuming that your story Is 100% true — no embellishment, no fibs, no shades of grey, , post the ...Well, apparently all JL's have battery issues, thank you Jeep. We had problems with our JLU, replaced it with a JLURD. (Right now the JLU is having other JL issues - oil cooler, cam shaft, valves - about 1/2 of an engine swap). Since we got the JLURD, we then have virtually never used ESS - but still that little battery has caused …Kraxler. Below the main battery. If you remove the main battery you should have access to it. Thank you! You were right. It is located right underneath the main battery. Easy in and out. I had a bum main battery from the factory and it drained my aux. battery. I replaced the main battery and the jeep still would not crank.There is not an immediate impact when the N3 fuse blows, but the aux battery and system electronics are now isolated from the alternator and the main battery. Everything will work as normal until the aux battery no longer has enough charge left to power up the electronics, resulting in the flashing system electronics and an inoperative …

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Location florida Vehicle(s) On my third Rubicon(2dr's 2020, 2015 jetta diesel/2013 mb ... 2021 Jl Wrangler ,2016Soul,Dyna,Sportster,HD Jan 11, 2022 #8 ... I've been in -17C/1F over the past few weeks and the Jeep started right up. The auxiliary battery holds its charge perfectly; ESS works every time and stays on for several minutes at some ...Gen 3 Dual Battery System. for 2018+ JL Wrangler with 3.6L & 2.0L Gas Engine. Genesis Offroad launched the first completely integrated, easy to install dual battery system for the Jeep Wrangler in 2013. Never satisfied with 'good enough', we have listened to customer feedback and refined our dual battery system to be even better suited to meet ...Location Bellingham, WA Vehicle(s) 2023 Jeep Gladiator, 2018 Fiat 124 Spider ... Jeep Wrangler Sport S JL 2-D Build Thread Link Occupation Professional dancer/male stripper Dec 22, 2022 ... The second battery reliably reads 12.9/13.0 volts at shut down and the main battery at shutdown reads 12.7/12.8. I'm using the Jeep's EVIC for main battery ...Pic 3 Depicts direction of running red positive wire to battery. Pic 4 depicts where the wire will leave the cabin and into the engine compartment. Step 3- run the wire using a hanger down the seam of the engine compartment and connect to battery positive terminal. Pic 5- shows where to run the wire in the engine bay.Oct 14, 2023 ... HOW TO Replace the Main and Auxiliary Battery on a Jeep JL Wrangler and JT Gladiator Truck. Wayalife•367K views · 6:15. Go to channel ...dual battery optima group 25 with battery isolator. voltage is so low that it won't even pull in the second battery for charging. lithium 300 AH in the back of jeep won't accept charge at that voltage either. digital battery test says both batteries ok everything seems fine except for the jeep won't let it charge. any help would be greatly ...According to this dealer, if the Wrangler has the second/aux battery, the load and charging tests can take up to 6 hours, instead of 3 hours, using whatever device/method FCA has for that test. And....about 6 hours after I drop it off, the determination was that the main battery was bad and it was replaced under warranty.

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Customers can find Deka Battery distributor locations using the Where to Buy search feature at EastPennManufacturing.us. The feature offers Deka Battery distributor location search...2018+ JL BATTERY DISCONNECT FOR BOTH BATTERIES When servicing the 2018+ Jeep JL 3.6, BOTH batteries must be disconnected. The primary battery terminals will still be hot unless this procedure is followed. First disconnect the ground on the primary battery Then disconnect the 3 ground wires on the fender. G …Location Kings Langley Vehicle(s) Jeep JL 3door Yesterday at 10:57 PM. Thread starter #1 Help! I am based in the UK and looking to order online quickly a good replacement aux and main battery. ... Jeep JL aux and main battery replacement. Thread starter jr-323i; Start date Yesterday at 10:57 PM; Watchers 1; jr-323i Well-Known Member. First Name ...We disconnected the battery on a 2018 jeep Rubicon JL today. The vehicle had a complete power after the battery was disconnected. We tried grounding the positive and negative terminals together but nothing changed. We chased around and found that there was a second battery or secondary power unit below the fuse box.Oct 9, 2021 · Went to replace the batteries in 2018 Jeep Wrangler Rubicon JL with the 2.0 liter engine and auto trans. and found out mine didn't have the second battery in it. It has the box it sets in but no battery or leads. Replaced the main battery and now my power steps won't retract. They start to then... Depending on power, size, and quality, prices for a replacement car battery range from about $45 to $250. Your local dealership, auto parts store or automotive service center can check your ...Due to the rapid rise of EVs in recent years and even faster expected growth over the next ten years in some scenarios, the second-life-battery supply for stationary applications could exceed 200 gigawatt-hours per year by 2030. This volume will exceed the demand for lithium-ion utility-scale storage for low- and high-cycle applications ...Need to find the PCR relay for the aux battery that's runs the start stop 2020 grand Cherokee. I want to by pass the sh## bag little battery. Save Share. ... 2017 GC LMT V6 265 70 17 whls JL. ... 1.7M posts 177.4K members Since 2009 Jeep Garage is where you can talk about all your favorite jeeps including the Cherokee, Liberty and Grand Cherokee.20770 posts · Joined 2013. #2 · May 11, 2021. A independent diode isolated deep cycle battery like used in tow behind trailers that can charge while driving and from solar sounds like what you want. Sent from my iPhone using Tapatalk. Like. Jerry Bransford. 50633 posts · Joined 2005. #3 · May 11, 2021.aldo90731. Jeep's OE battery rarely last more than 18 months; often less than 12. If your Jeep still had the original batteries, your issue could very likely be completely unrelated to it being towed. If I were you, I'd replace both the main and the auxiliary batteries and see if that takes care of the issue.Here's the underside of the PDC cover showing the description and location of the fuse. ... 2022 JL Rubicon Jun 19, 2022 #8 ... I plan to push the button. But I would then remove that aux battery as don't want a non functioning battery in the Jeep. On 4/21 I took her home! Reactions: Wrangler man, sstuner, JL ME and 1 other person.The second battery continues to power your accessories for as long as it will last. After you crank the vehicle, your main cranking battery will be charged up to 13.2 volts first, and then the isolator will begin charging your accessory battery. ... Fits 2018 and up Jeep Wrangler JL. Requires 2 identical Group 25 size batteries, sold separately ... ….

For clarity: the aux switch wires will be between the battery and the side of the Jeep's Engine bay. They will be wound and taped into place. Use these for external items (winch, lights, etc) you will also find the same wires in The passenger footwell (Tucked under dash) If there are interior things you wish to hook-up (compressor, communications, etc).If this battery lacks adequate power, if you are operating a 3.6L JL on or after 2019 (and at least with respect to the model year you are) you vehicle will not crank, but upon second attempt it will switch over to the main battery and attempt the crank. If successful the vehicle will disable ESS, and tell you so in the diagnostic panel--a good ...Location Chicago, Illinois Website www.onward4x4.com Vehicle(s) 2018 Jeep Wrangler JLU ... so that (what Genesis refers to as) your cranking battery will have enough power to start the engine. The second battery will continue to power your accessories for as long as it will last. ... However I wonder why Jeep made the JL a 2 battery ESS thing ...I just can’t take a chance with the toy battery and suspect main battery. There is no cell service 115 degree temps and a long walk home in the areas we off-road. What a pain to get to the small battery, hope u have a couple of hours to replace it. The way I see it, Jeep owes me 1100.00.Troubleshooting 2021 JLUR Battery Issues. Must be my turn to have the battery issues. 2021 JLUR and it has been flawless (so far) with only 3900 miles. My stop-start has worked as it should until now. Nothing has changed as far as I can tell, but the stop-start has not worked for 2 days in a row. The battery gauge shows 14.2-14.3 all the time.Warranty Information. The Genesis dual battery system for the 2020+ Jeep Wrangler diesel and 392 is a game-changing upgrade for any off-road enthusiast. This powerful system allows you to run all of your electronics, such as lights, winches, and fridges, without draining your main battery. With a fully sealed and waterproof design, the Genesis ...Replacing the main battery in my 18 and even after doing the fuse/ground cable bypass still have the stop start unavailable; service system message at start up. ... Location North Jersey Vehicle(s) 2018 Mojito! JLS, 2018 Firecracker JLUSS Build Thread Link Occupation ... '18 JL Sport - 2.0T, 8AT, M220 rear, A/C, tinted soft top, Mopar tubular ...Customers can find Deka Battery distributor locations using the Where to Buy search feature at EastPennManufacturing.us. The feature offers Deka Battery distributor location search...I've recently picked up a gremlin with my passive entry not working. Touching the front doors or tailgate no longer unlocks the Jeep. Using the button on the fob does. Once in the Jeep, pressing the START button results in "Key Fob not Detected". Holding the fob to the button works, as does holding the fob against the top of either B-Pillar.How to change the auxiliary battery on your Jeep Gladiator JT or Wrangler JL.Parts & ToolsAuxiliary Battery Group Size 400Socket Set https://amzn.to/3RM81HD1... Jeep jl second battery location, Troubleshooting 2021 JLUR Battery Issues. Must be my turn to have the battery issues. 2021 JLUR and it has been flawless (so far) with only 3900 miles. My stop-start has worked as it should until now. Nothing has changed as far as I can tell, but the stop-start has not worked for 2 days in a row. The battery gauge shows 14.2-14.3 all the …, Auxiliary Battery Charge Needed/Functions. 2017 Grand Cherokee Summit. I recently had four dash lights come on to include Service Cruise Control Disabled, Front Collision Warning (FCW) Disabled, Electronic Stability Control (ESC) Service, and Battery Fluid Low. I took it in to be looked at and the Jeep dealer diagnosed it as the Auxiliary ..., Depending on power, size, and quality, prices for a replacement car battery range from about $45 to $250. Your local dealership, auto parts store or automotive service center can check your ..., Hello guys been getting the battery protection mode message from day 2 of purchase, dealer charged the battery on first visit second visit they said it was normal stop using the auto stop feature and it still goes into battery protection mode., Location Oregon Vehicle(s) 2019 JL, 2016 Jeep Grand Cherokee Altitude Ecodiesel, 2005 Mustang GT, 2018 Ford Raptor, 2018 BMW R1200GSA, 2020 Honda Monkeybikes (2), 1972 Honda CT-70, 1980 Honda CT-70, ... The clerk attached a small phone-sized device to the battery for a couple second and said, "Your battery is fine". The old load-tests used ..., #1 · Mar 16, 2022. Must be my turn to have the battery issues. 2021 JLUR and it has been flawless (so far) with only 3900 miles. My stop-start has worked as it should until now. …, The Jeep Compass has a second battery located under the passenger seat, requiring specific tools such as a ratchet and extension, 10mm socket, and wrench to access it. Follow these steps to access the auxiliary battery: First, lift and remove the passenger seat to reveal the battery compartment. Use the ratchet and extension to loosen the hold ..., In this video, you’ll get to see just how easy it is to replace the main battery AND what all you’ll need to do to replace the auxiliary one. We hope it helps you out. HOW TO Replace the Main and Auxiliary Battery on a Jeep JL Wrangler and JT Gladiator Truck. Watch on. Type S Jump Starter: https://amzn.to/31fyFRI., this is the easy way to swap your battery. Lots of folks dont knowabout this hidden battery., Aug 7, 2023 ... Comments31 ; Jeep Compass Auxiliary Battery Replacement. MotorCity Mechanic · 164K views ; What You Might Not Know About the Jeep JL Aux Battery., HDRAMS.COM MOPAR INSIDERS NEXT F150 WL JEEP FORUM. Resources. Download owners manual Technical Service Bulletins Forum Rules Become a vendor. ... as the truck is brand new. But where is the E-torque battery located? Dewey Spends too much time on here. Joined Mar 30, 2022 Messages 3,255 Reaction score …, HDRAMS.COM MOPAR INSIDERS NEXT F150 WL JEEP FORUM. Resources. Download owners manual Technical Service Bulletins Forum Rules Become a vendor. ... as the truck is brand new. But where is the E-torque battery located? Dewey Spends too much time on here. Joined Mar 30, 2022 Messages 3,255 Reaction score 6,056 Location WI. Sep 15, 2022 #2 Behind ..., The OEM batteries aren't very good, and the cost is simply too high for what you get, and I'm more than capable of replacing the troublesome aux battery myself if I want to. And in EVERY case, I would either bypass the aux battery, or replace both at the same time. -2020 JLU Freedom Edition, Sting Gray, 3.6 L, A/T, Dynatrac Endurosport 2" Lift., In late 2020, we noticed that the auto start stop function stopped working in my wife’s 2020 JLUR. Her Jeep was just one year old. No warning notifications, we just noticed it never worked. Scrolling down the EVIC, it just said battery charging. Took it to the dealer, and they said the driver..., The ESS uses the 48v battery when the engine has eTorque, the 2.0 eTorque was dropped and replaced with just ESS. To break this down, all Wranglers have 2 batteries. Regular ESS models have the main 12v and small 12v auxiliary battery eTorque models have the main 12v and 48v secondary battery. HTH, Location Murphy, NC Vehicle(s) 2018 JLU Sahara, 2003 F150 S-Crew FX4, Others ... Disconnect the negative cable from the battery when the Jeep sits for longer than a week. It's a hassle, but it's better than coming back to a dead battery. ... single battery JL like your old TJ, JK, your old Chevy with their single battery. Yes, still maintain ..., I began a process of recharging my battery completely (12-9-13.0V) on the weekend only to find it at ~50% SOC (12.1 - 12.2V) after 1 weeks time. I drive my Jeep about 44miles a day, Monday thru Friday. Back in 2021 I installed a new Duralast Platinum AGM battery thinking it was a bad battery, but I'm still having the same issue now., The second was use of the new Lithium Battery from Antigravity. Anyone run these. Lookin. Sponsored . ShadowsPapa Well-Known Member. First Name Bill Joined Oct 12, 2019 Threads 180 Messages 29,634 Reaction score 35,264 Location Runnells, Iowa Vehicle(s) '22 JTO, '23 JLU, '82 SX4, '73 P. Cardin Javelin ... With the jeep you …, 2018 jeep wrangler jl Feb 20, 2023 #11 ... Extra battery weight located low and center of the vehicle; ... This kit's second battery and power hub just consume way too much interior space. I do appreciate the detailed explanation in this thread but the design is a show stopper for me. Instead, I'll go without dual batteries and run a ..., Thanks for the input! At first when this happened and I came back to a dead auxillary battery, I figured that I could drive without it. At some point the main battery went dead after that. When I asked at the dealership whether driving with a dead aux battery could drain the main, they said that it was a possibility., Jan 19, 2018 · In the JK, most systems require the replacement of the battery/fuse box platform to make room for the two batteries. Will a similar replacement be possible for the JL? Update: this question was posted way before the ESS battery was mentioned. I believe that the 2017 GC had one under the front seat. , IBS Testing I have conversed with Jerry @Jebiruph on this thru a few PM's and then proceeded to let my OCD rule my life and started digging to get some info with some testing of course. As most are aware the JL like most newer vehicles uses a IBS/IBM ( Intelligent Battery Sensor/Intelligent Battery Management Sensor) that's mounted to the negative terminal on the main crank battery but in ..., Antigravity Battery H6/Group-48 Lithium Car Battery; 60Ah. (12-24 Jeep Wrangler JK & JL) $ 1049.99. May 09 - May 13. US Only, No APO. Performance Distributors Dyna-Batt-12 Volt Dry Cell Battery with Top Post Terminals- 8-1 Gauge. $ 225.00. Antigravity Battery H6/Group-48 Lithium Car Battery; 40Ah., WK2 - New battery type and location. An AGM battery is a sealed unit that uses special relief valves to vent vapors from the battery. The electrolyte is stored in sponge like separators consisting of matted glass filters. This suspension increases the efficiency of the charging and discharging rate of the battery., Aug 1, 2020 · As been said before, most of the time the two batteries are hooked up in parallel in the 3.6L, including when the rig's at rest and no alternator is running. This allows one battery to steal power from the other, where the ESS/Aux battery is usually the thief. Here again--this may just be a need for a simple main battery swap. , jawest12. 752 posts · Joined 2014. #2 · Nov 15, 2020. No. You have a large 48 volt battery under the jeep on the driver's side. Opposite the gas tank. Sent from my SM-G975U using Tapatalk. My '18 JL Turbo Build. My '17 Big Bear Build - Sold., There are a few methods to delete the aux battery. My plan is to remove the aux battery the connect it's pos terminal to the main and just tape up the aux's negative terminal. From what I've read that's the best way for my 2018 JL. 2018 JLUR, Firecracker Red., 2018 jeep wrangler second battery location Battery dual setup jeep jk wrangler Battery location and removal jl jeep wrangler "the lazy way" 2018 jeep wrangler auxiliary battery. Jeep cherokee auxiliary battery Odyssey battery 34m-pc1500st-m extreme series batteries with auxiliary Wrangler jk. Jl jlwranglerforums unlimited rubicon sahara, Location Dallas, Tx ... '18 JL Rubi, '22 Prevost M H3-45,'01 Harley FatBoy ... You can disconnect the ground cable the goes from main battery negative terminal to the ..., The 2nd battery is a true backup. No loads connected to it unless I need it to start the jeep and it is disconnected from the primary battery if the ignition is off. When ignition is on and alternator voltage is above 13.2 volts the backup battery is charging. Flip a switch to connect the backup battery and start the jeep., I'm in need of guidance on the charging of a secondary battery in the bed of the truck and running power from that second battery instead of straight from starter battery. Lets say i want to run a 3000watt inverter in the bed of the truck but that requires a 4/0 gauge wire run all the way to the starter battery (only using it at 3000watts when ..., 3/8" ring, 12-10ga. Genesis Gen3 Dual Battery System for the Jeep Gladiator. This is our most advanced dual battery system which provides infinite control of the dual battery system. Whether you are overlanding, working, wheeling or have big audio needs, this Gen3 system will maintain your batteries and give you the needed power for starting., As been said before, most of the time the two batteries are hooked up in parallel in the 3.6L, including when the rig's at rest and no alternator is running. This allows one battery to steal power from the other, where the ESS/Aux battery is usually the thief. Here again--this may just be a need for a simple main battery swap.