All dash lights at once

[courson64]

I have a 2020 gladiator rubicon with 72k miles. All of my dash warning lights come on at once. Service shifter, ABS, sway bar disconnect, CEL, ESS, and more I’m sure I’m missing. Bypassed the aux battery and replaced the main battery and I’m still having the issue. Pulled all of the codes are there are about 30. The only one that I’ve caught active is the ABS Vacuum Control Circut. Sometimes it’s fine for days then other times it’s multiple times a day. Has anyone had this issue or can help with some advice? TIA

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[Bandit’s Lair]

Have you replaced the Aux and seen if that clears everything? Other than that I’d go over the delete again and make sure everything is wrapped up tight. If that’s all you’ve done to the Jeep recently that’s probably where the problem is. If I recall you have to leave it unhooked for a while before reattaching. I think I did that.

 

[Lost1wing]

There is a star case on your vacuum fault. It says to looks for vacuum leaks and electrical connections.

 

[courson64]

Deleting the AUX was an attempt to stop the lights from happening. Pulled fuse F42 isolated aux negative heavily with electrical tape.

 

[Bandit’s Lair]

Would a loose CanBus thing cause something like this? That’s a lot of codes to pop all at once. Sounds more like a “brain” injury than an electrical problem.

 

[courson64]

I’m going to replace the Star connector and see if that fixes it. Worth a shot

 

[courson64]

I’m going to replace the Star connector and see if that fixes it. Worth a shot

Tons of lost communication error codes

 

[MaximusTX]

I have a 2020 gladiator rubicon with 72k miles. All of my dash warning lights come on at once. Service shifter, ABS, sway bar disconnect, CEL, ESS, and more I’m sure I’m missing. Bypassed the aux battery and replaced the main battery and I’m still having the issue. Pulled all of the codes are there are about 30. The only one that I’ve caught active is the ABS Vacuum Control Circut. Sometimes it’s fine for days then other times it’s multiple times a day. Has anyone had this issue or can help with some advice? TIA

I had the same issue when I was on the Rubicon, the dash lit up like a christmas tree, the windshield wipers started going, headlights were flashing and the horn was going off. I shut it off and then turned it back on and it was normal except for the CEL light but I changed phones and forgot to transfer the license for JSCAN so I wasn't able to check it until I got home. It drove fine the rest of the trip but when I did get the codes scanned it had over 90 codes with codes from every module and lot of them were lost communication ones even had VIN mismatch errors and some other ones. I cleared all the codes and haven't had any issues since that one and it was over a year ago now. Not sure what happened but it sure didn't like it.

 

[BourbonRunner]

Deleting the AUX was an attempt to stop the lights from happening. Pulled fuse F42 isolated aux negative heavily with electrical tape.

Is the positive still on the aux battery? Yank that off and attach it to the positive main and see if that helps.

 

[Rusty PW]

Which engine you have? Gasser, or diesel?

 

[courson64]

Gas

 

[Rusty PW]

Gas

Ok.... that rules out the wiring harness rubbing on the exhaust bracket on the early diesels.

 

[ShrimpHappens]

I’m going to replace the Star connector and see if that fixes it. Worth a shot

This is my vote. I had similar symptoms that were remedied by replacing the star connector. You ought to be able to zoom in with your phone camera and find broken solder:

 

[bd100]

For a one-off occurrence, it might be that a nearby ham transmitter or CB radio guy with tonz-o-power lit up and swamped your vehicle's electronics. But if it comes back again then yes the aux battery or the CAN bus, etc.

 

[AusJeep]

I’m going to replace the Star connector and see if that fixes it. Worth a shot

This reminded me of a very similar thread you might've already come across.
The star connector was indeed the culprit in this case.

All dash lights are on | Page 2 | Jeep Gladiator (JT) News, Forum, Community - JeepGladiatorForum.com

Wishing you all the best through this; electrical gremlins are a nightmare. Process of elimination and it's only a matter of time until you find the cause.

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