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Main battery and Aux Battery replacement write up

MudderNuker

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First Name
Jose
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I drove the Gladiator for a couple of hours yesterday doing some errands and had no starting issues. The temperature dropped to low 20s last night and this morning I attempted to remote start the truck and it didn't start. I got in and tried to start it by pressing the button, but all hell broke loose. It turned into a Xmas tree with all lights and all kinds of clicking noises. The only way to reset everything was to disconnect the ground terminal from the main battery and the N1 terminal on the fuse box. Luckily, I had my NOCO jump pack at the ready. It started right up after reconnecting the terminals. Obviously the two battery design is not optimal on these trucks. On our old WK2 Grand Cherokee without ESS the original battery lasted 8 years. The Gladiator's barely made to 4.
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MudderNuker

Well-Known Member
First Name
Jose
Joined
May 20, 2023
Threads
16
Messages
427
Reaction score
489
Vehicle(s)
'21 JTR
Occupation
Retired@52
I drove the Gladiator for a couple of hours yesterday doing some errands and had no starting issues. The temperature dropped to low 20s last night and this morning I attempted to remote start the truck and it didn't start. I got in and tried to start it by pressing the button, but all hell broke loose. It turned into a Xmas tree with all lights and all kinds of clicking noises. The only way to reset everything was to disconnect the ground terminal from the main battery and the N1 terminal on the fuse box. Luckily, I had my NOCO jump pack at the ready. It started right up after reconnecting the terminals. Obviously the two battery design is not optimal on these trucks. On our old WK2 Grand Cherokee without ESS the original battery lasted 8 years. The Gladiator's barely made to 4.
Got my batteries two days ago but it hasn't stopped snowing. Hope to install soon.
 

MudderNuker

Well-Known Member
First Name
Jose
Joined
May 20, 2023
Threads
16
Messages
427
Reaction score
489
Vehicle(s)
'21 JTR
Occupation
Retired@52
So finally the weather cooperated and we had temperatures above freezing so I decided to take advantage of balmy 38 degree garage and replaced both batteries. I started at 11:56 and was done at 12:29 (same day 🤣). Exactly 35 minutes including looking for some tools. I went in from the top and it is a very simple and easy process. I believe it is even easier than going through the wheel well which requires lifting the Jeep and removing a heavy tire plus removing the plastic rivets which would probably take longer. Started right up with no warning lights or errors.
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