oK I was trying to understand this aux battery and why Jeep and whoever needs them vs others with only main battery, I mean if the computer is so sensitive, to me that would be the issue in design. But I will say my 21 JTR still has OEM aux battery and the darn video you made that started my brain on this quest does make it look easier than I thought.
SO I give up
Jim
LOL - one has to wonder if your manhood is in question here or something but I do commend you on your commitment to thisThe advanced class kids delete or bypass the AUX, because it's notorious for crapping out and taking the the main battery down with it.
The batteries are parallel except during ESS events, so if one begins to die, it is free to start sucking the life out of the other. A situation that has left many high and dry.
It's an emissions reduction feature to appease the EPA and get a slightly better MPG rating on the window sticker.
Some people disable ESS with a Tazer, but unless you break the physical link between the two batteries, you're still at risk for it dying and taking the main down with it.
At any rate, do what works best for you. Mine has been offline for over a year and zero issues. ESS still works off the main battery, on the rare occasions when I overlook hitting the button.
It takes maybe ten minutes to put back to factory setup if I need to go in for any warranty services.
Same with the catch can
LOL - clearly the design is stupid. I don't think anyone has ever questioned that. All I have been trying to do is help people from making a decision that might affect things like their warranty. But, as mentioned, it's your Jeep and you should always do what you believe is best for itoK I was trying to understand this aux battery and why Jeep and whoever needs them vs others with only main battery, I mean if the computer is so sensitive, to me that would be the issue in design. But I will say my 21 JTR still has OEM aux battery and the darn video you made that started my brain on this quest does make it look easier than I thought.
SO I give up
Jim
This forum has what 30-40k members. Say one third of them have 2018 and newer platforms (JL/JT). I’ve literally never heard of a single one that has been “left high and dry” from a battery crapping out.The advanced class kids delete or bypass the AUX, because it's notorious for crapping out and taking the the main battery down with it.
The batteries are parallel except during ESS events, so if one begins to die, it is free to start sucking the life out of the other. A situation that has left many high and dry.
It's an emissions reduction feature to appease the EPA and get a slightly better MPG rating on the window sticker.
Some people disable ESS with a Tazer, but unless you break the physical link between the two batteries, you're still at risk for it dying and taking the main down with it.
At any rate, do what works best for you. Mine has been offline for over a year and zero issues. ESS still works off the main battery, on the rare occasions when I overlook hitting the button.
It takes maybe ten minutes to put back to factory setup if I need to go in for any warranty services.
Same with the catch can
My main battery crapped out in the garage, on the morning of a 2000 mile trip through the wastelands. The dash went totally crazy so I thought that the aux battery was the cause. The main battery had only 5 volts on it. So we took a different vehicle.
I know! I’m gone a couple of days and miss out on all the fun!
