2025 Jeep Gladiator won't start and impossible to jump start

Auxiliary battery failure drained main battery $1000 repair to replace both batteries. Regular V6 not EV Hybrid. In shop for a week. Only 5000 miles total. Dealer refused to bypass aux battery, Jeeple have 5 ways to DIY that. Then tow truck exploded a hydraulic line. Wild albino deer supervised the mayhem madness.

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 things running during the Auto Stop/Start cycles. While this sounds great, there are issues when the Aux battery starts to die. Once you Aux battery stops holding its charge, it will cause your main battery to drain; thus you not being able to start your engine. The other common issue is with the Aux battery’s voltage low it will block you from starting the engine even with a fully charged main battery. Lastly, the Aux battery is not the easiest thing to change. So, don’t let the Aux battery leave you stranded - get it disabled/bypassed today.

The F42 fuse removal in engine bay will bypass ESS from Aux battery but NOT delete function. It will just move function to Main battery once cables are removed. You will still to use dashboard button to Auto/Start off. Or don't wear a seatbelt. Or use a Tazer or Autostop Eliminator plug in for custom program.

Z Automotive Tazer Mini Programmer. Does not bypass Aux Batt but bypasses having to press bypass factory switch when driving. Tazer mandatory after tire mods.
https://www.amazon.com/gp/aw/d/B09N9RMVFP/ref=ox_sc_act_title_2

Z Automotive SGW Extension Cable
https://www.amazon.com/gp/aw/d/B0B7VR6W1F/ref=ox_sc_act_title_1

Lightweight $1500 Lithium car battery with 10 year lifespan and jumpstarts automatically by bluetooth
https://antigravitybatteries.com

https://www.jeepgladiatorforum.com/forum/threads/ess-dual-battery-system-operation.44028/

https://www.google.com/search?q=jeep+gladiator+ess+system