I followed the same procedure you did (on my '21 JT Mojave), but I also replaced the JT's main battery, because the AUX had died and it took the main down with it. HOWEVER, my start/stop system continues to work to this day. It's been about 7 months since I followed the same "disconnect" procedure you've described here. Someone else on YT recommended that I also disconnect the positive cable (from the aux battery) where it connects at the main battery - but, I got complacent & have just been pushing the cockpit button to disable the system. What I've finally decided to do is to completely remove the aux battery, accessing it via the wheel well instead of from the engine bay. I may also add an onboard charger/maintainer to the aux battery box after I remove it. Picked up a NOCO Genius 2D at a good price during the holiday discounting.
@@larryb7047 the only way to NOT have to push the button is get a Tazer is what I’m told. This gets rid of the light and stops killing your main battery.
Of all the vids I've seen this one explaining the 2021 Mojave did it for me. Thanks. I did the rear locker sensor and fuse removal of f22 it got to dark to play with wires.
I did the delete on mine also, pulled the battery and fuse and wrapped up the battery ends on the old battery connection and at that main battery. I finial replaced the main battery after a year with a bigger H7 battery.
Very nice video. Just as a FYI, not all 2021's are like yours. Mine is a 2021 which was built in Sept of 2020 only has the 2 ground cables and the outboard one is the one for ESS. I believe Jeep made a mid model change in April(ish) of 2021 on the 2021MY JT's.
Good video! Did this on my 21 JT, reverse camera didn't work afterward. Since the auxiliary battery wasn't dead, I reversed the delete the next day then drove the vehicle than deleted it again and reverse camera started working. Must of took time for the computer to recognize change of current flow?
Tried this last night on 22 rubicon diesel. I lost my climate control functions, and my radio screen had a blue background. Stayed that way even after I put it back. Hoping it will return to normal after a few ignition cycles. If not, I will try hard reset.
I disconnected negative terminal on the main battery and that seems to have gotten the warning and the yellow light off. Seems to have screwed up the infotainment console but that may reset itself. I'll look into it tomorrow. Thanks for your help
Yes, thats what i meant but some of the apps didn't show up. And y XM radio didn't load back. Maybe it'll do better after it sits tonight. Thank you for your help@TheCrayonBrotherhood
Successful by-pass, Main Battery now holds voltage. Only issue now is the Air Bag Red indicator dash light is on. Tried disconnecting Main Battery to reboot the system but no help. Hate to take it into the dealer.
Hey so I pulled fuse 42, removed the L shaped terminal, taped it up..everything you did in your video. My Jeep starts up perfectly fine, but I'm still getting the "A!" on the dash with the warning coming up "Start/stop unavailable". Any idea why?
I've disconnected the correct auxiliary battery ground AND pulled fuse 42 but I'm still getting the reminder and that dang yellow light. The yellow "A" with the ! Did you completely disconnect your main battery? I'm thinking this may be needed to reset the computer?
I actually disconnected my main battery after disconnecting the auxiliary battery and removing fuse 42. After connecting main battery back up, everything worked as it should with NO lights or warnings
Great Video, thank you!!! Get ur done!!!
great explanation bud. I was disconnecting wrong wire from other videos and you did explain amazing. Thanks bud!!!
@@aussie1546 glad it helped
I followed the same procedure you did (on my '21 JT Mojave), but I also replaced the JT's main battery, because the AUX had died and it took the main down with it. HOWEVER, my start/stop system continues to work to this day. It's been about 7 months since I followed the same "disconnect" procedure you've described here. Someone else on YT recommended that I also disconnect the positive cable (from the aux battery) where it connects at the main battery - but, I got complacent & have just been pushing the cockpit button to disable the system. What I've finally decided to do is to completely remove the aux battery, accessing it via the wheel well instead of from the engine bay. I may also add an onboard charger/maintainer to the aux battery box after I remove it. Picked up a NOCO Genius 2D at a good price during the holiday discounting.
@@larryb7047 the only way to NOT have to push the button is get a Tazer is what I’m told. This gets rid of the light and stops killing your main battery.
Did mine so far so good
Of all the vids I've seen this one explaining the 2021 Mojave did it for me. Thanks. I did the rear locker sensor and fuse removal of f22 it got to dark to play with wires.
I did the delete on mine also, pulled the battery and fuse and wrapped up the battery ends on the old battery connection and at that main battery. I finial replaced the main battery after a year with a bigger H7 battery.
if you go through the fender well 3 bolts hold the bottom tray which allows you to drop the aux battery out.. Its how I removed mine
Very nice video. Just as a FYI, not all 2021's are like yours. Mine is a 2021 which was built in Sept of 2020 only has the 2 ground cables and the outboard one is the one for ESS. I believe Jeep made a mid model change in April(ish) of 2021 on the 2021MY JT's.
Interesting, I had no idea they changed the setup like that.
Good video! Did this on my 21 JT, reverse camera didn't work afterward. Since the auxiliary battery wasn't dead, I reversed the delete the next day then drove the vehicle than deleted it again and reverse camera started working. Must of took time for the computer to recognize change of current flow?
@@markstebelton5953 oh wow this is a first for me on the camera not working. Did you completely disconnect the battery after the bypass ?
@@TheCrayonBrotherhood No, battery still in vehicle. Its dead now.
Tried this last night on 22 rubicon diesel. I lost my climate control functions, and my radio screen had a blue background. Stayed that way even after I put it back. Hoping it will return to normal after a few ignition cycles. If not, I will try hard reset.
@ hey sorry for taking so long to respond been out on the trail. Did it start working? The diesel maybe wired up different.
I disconnected negative terminal on the main battery and that seems to have gotten the warning and the yellow light off. Seems to have screwed up the infotainment console but that may reset itself. I'll look into it tomorrow. Thanks for your help
I had to go in and set my infotainment system back up with the settings colors and back ground of my likings if that’s what you mean?
Yes, thats what i meant but some of the apps didn't show up. And y XM radio didn't load back. Maybe it'll do better after it sits tonight. Thank you for your help@TheCrayonBrotherhood
Everything is good now. I just had to give my system a chance to reset after disconnecting negative terminal. Thanks for your help!!
I've been looking for my aux battery for over an hour now on my Wrangler, i can't find it...............;)
Successful by-pass, Main Battery now holds voltage. Only issue now is the Air Bag Red indicator dash light is on. Tried disconnecting Main Battery to reboot the system but no help. Hate to take it into the dealer.
@@SteveM-et7hm sorry been out on the trail, did you get it working?
@@TheCrayonBrotherhood Yes, it was the fuse, F49.
Do you still have no issues with your Jeep? I have a '21 Gladiator I Want to try this on
Nope none.
Great!!! Thank you. I'll try this when i get home@@TheCrayonBrotherhood
Hey so I pulled fuse 42, removed the L shaped terminal, taped it up..everything you did in your video. My Jeep starts up perfectly fine, but I'm still getting the "A!" on the dash with the warning coming up "Start/stop unavailable". Any idea why?
@@shelbotron09 disconnect the positive terminal from your battery. Let it sit for about five minutes and reconnect.
@TheCrayonBrotherhood ah okay. Is this essentially resetting the computer settings? Also, is a voltage of 14.1 normal after doing this?
@ ya it should level back out in the high 13s sometimes in the 14s. It’s just like if you replaced the battery.
I've pulled fuse 42 and disconnected auxiliary negative but still have that same message. Any ides?
@@chipforeagle it’s difficult to say without seeing it first hand. Depending on what year your jeep is determines what cable you remove and cover up.
I've disconnected the correct auxiliary battery ground AND pulled fuse 42 but I'm still getting the reminder and that dang yellow light. The yellow "A" with the !
Did you completely disconnect your main battery? I'm thinking this may be needed to reset the computer?
@@chipforeagle yes I did, let me know if that does the trick for you.
@@chipforeagle I still get the warning as well on my 2021 JL. I removed the aux battery from my jeep too.
I actually disconnected my main battery after disconnecting the auxiliary battery and removing fuse 42. After connecting main battery back up, everything worked as it should with NO lights or warnings