Stop/Start issues continue

Ddays said:
Haven't posted about it but my daughters JL (Badger) has been in the shop for 2-1/2 months with an unsolvable electrical issue. Donated to the dealership retirement fund twice - $1400 once & $800 and was assured it as fixed. Went to pick it up the second time and it had the exact same issue. I picked it up with my trailer out of their lot and took it t the shop that built Gruff. He's stumped & consulting electrical gurus to no avail.

Was getting the start/stop message - I thought it was the batteries and changed both - didn't do anything. Next issue was the Christmas light effect. Last time I attempted to drive it the fucking power steering went totally out & I almost drove off the road going around a sharp corner. Anyone else had that happen? It's 100% worse than a manual steering vehicle - it's like trying to turn the steering wheel with the engine off. And then we finished the act by not even allowing me even shift it out of park. So it's sitting. I'd consider telling her to dump it but it's stuck.
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Well thanks for that nightmare LOL I hope it's not that bad but this being the second auxiliary battery and soon to be the third in less than a year I wish there was a way to completely take out the start stop starter and just eliminate that whole fucking system
 
jeeeep said:
Well thanks for that nightmare LOL I hope it's not that bad but this being the second auxiliary battery and soon to be the third in less than a year I wish there was a way to completely take out the start stop starter and just eliminate that whole fucking system
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Followup for my issue: Took to a new dealer and they scanned it, found 5 outstanding TSB's that evidently the dealer by me was too retarded to check for, or just ignored. One of the TSB's was for the bus bars behind the glove box. Ordered in and installed the next day and we're back in business.
What should have been fixed in June took the entire Summer of it bouncing around. Fuckers.
 
Ddays said:
Followup for my issue: Took to a new dealer and they scanned it, found 5 outstanding TSB's that evidently the dealer by me was too retarded to check for, or just ignored. One of the TSB's was for the bus bars behind the glove box. Ordered in and installed the next day and we're back in business.
What should have been fixed in June took the entire Summer of it bouncing around. Fuckers.
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I forget about that bus bar, my issue happens every time I take bumps too hard or in the last case, hit a chuckhole in NM at 70mph. Once it's had time to reset, everything is back to normal, that last time it took over a month.

I'm thinking the aux battery has enough space to bounce and now has loose internals, I remove it and haven't been able to duplicate the issue; still some other things I want to check, the bus bar will be added to the list.
 
I have been having trouble with my 2018 JLUR. The first indication was the center stack below the radio wouldn't come on for up to a minute after starting the vehicle so I couldn't adjust volume or HVAC. Then Traction Control light, and some other warning lights would come on and off intermittently. It wouldn't start one morning 2 weeks ago. I replaced the AUX battery and it worked. Center stack starts as soon as the vehicle is running, no other warning issues. Then I started having voltage problems. Replaced the MAIN battery - O'Reilly said it the old one was too dead to test. Still having issues, I had both batteries tested at O'Reilly's. Both are good. Disconnected the IBS, started vehicle and waited for Stop/Start warning light, shut Jeep down, reconnected IBS. Jeep runs for a day at 14.4V. Next day, it dropped to 13.8V. When I coast, it goes back to 14.4. It seems speed sensitive and not RPM driven as I put in neutral and is still 14.4 until speed drops below 10MPH. I replaced the IBS with a new one purchased at a Jeep dealer for $107. Acts the same. I'm going out now to remove all connections on the positive post on the MAIN battery to make sure they are tight. I read this could cause this issue. I don't understand why this could be sensitive to speed and not RPMs. I welcome any thoughts (short of trading for a Bronco or Caravan).
 
boisedan said:
I have been having trouble with my 2018 JLUR. The first indication was the center stack below the radio wouldn't come on for up to a minute after starting the vehicle so I couldn't adjust volume or HVAC. Then Traction Control light, and some other warning lights would come on and off intermittently. It wouldn't start one morning 2 weeks ago. I replaced the AUX battery and it worked. Center stack starts as soon as the vehicle is running, no other warning issues. Then I started having voltage problems. Replaced the MAIN battery - O'Reilly said it the old one was too dead to test. Still having issues, I had both batteries tested at O'Reilly's. Both are good. Disconnected the IBS, started vehicle and waited for Stop/Start warning light, shut Jeep down, reconnected IBS. Jeep runs for a day at 14.4V. Next day, it dropped to 13.8V. When I coast, it goes back to 14.4. It seems speed sensitive and not RPM driven as I put in neutral and is still 14.4 until speed drops below 10MPH. I replaced the IBS with a new one purchased at a Jeep dealer for $107. Acts the same. I'm going out now to remove all connections on the positive post on the MAIN battery to make sure they are tight. I read this could cause this issue. I don't understand why this could be sensitive to speed and not RPMs. I welcome any thoughts (short of trading for a Bronco or Caravan).
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Check all the ground connections to make sure they are tight.
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do you have accessories connected to the battery? make sure any positive connected accessories are connected to the main post cable, not the aux battery cable.

Is stop/start disabled with a tuner? I have the Tazer JL to remember the last setting of stop/start so around town start/stop is always disabled but when on the freeway I enable it and it seems to allow that aux battery to get a full charge, haven't had any issues since I begin doing this. Wierd as hell because it shouldn't matter but it works for me

Also check the Z-fuse to make sure it doesn't show any burn marks and that it's seated properly
 
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