2018 JLUR significant electrical issues

[Phillpry46]

Good morning all! I'm new to these forums. I ended up here while trying to find answers to the issues I'm having with my 2018 Wrangler Sahara. Identical issues as James in FFX STN VA but mine occurs periodically (and with varying degrees of severity) while driving in the rain. Given the discussion here I am going to assess and replace the CAN BUS connector. I wanted to mention the issue arising in the rain to see if anyone had thoughts? To me an electrical component must be exposed or improperly insulated and getting wet as water is thrown around from puddles, tires, draining, etc. Thank you!

Ya water is draining above your electronic sway bar plug. What i did was cleaned the wire connections plugged it in and coated the plug and conector in spray on rubber sealer. Havnt had issue since.

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[azjl#3]

That was the dealership's first guess so they tested the batteries and said it is definitively not a battery issue.

My guess is that it is a grounding issue with a wire bundle. They spent hours checking fuses and chasing wires but haven't found a culprit.

If we ever find the issue, I'm guessing it is a cut or abrasion in a wire bundle...

how old are the batteries? replace them if over 3 years.

 

[tony6756]

I have a 2018 Jeep Wrangler, built July 2018, which started having electrical issues this past November (2022) and have gotten worse effectively limiting the use of my Jeep to near home, low risk trips (groceries, commute, but not airport).

The Jeep periodically (1 out of 5 trips) has what I can only describe as an electrical storm where all the dashboard warning indicators illuminate, power steering (sometimes) shut downs, "Service ABS" indicates failure, "Service Electronic Stability Control", "Stop/Start Unavailable Service Stop/Start System", "Sway Bar Disconnect Unavailable" indicates failure, "SERV 4WD", parking break light comes on (brake off), check engine light illuminates, airbag indicator light illuminates, , seat belt indicator (while wearing), AutoPark disables, ParkSense "Off", Blind Spot Alert "Unavaible", "Service Shifter", etc. Sometimes the engine fans spin up as if the vehicle is overheating.

This morning on my commute I had this occur and pulled off to the last parking lot before the interstate, as I did not want to drive on the highway without power steering. Once parked the first restart resulted in all the alerts presenting again, not sure about power steering as I was parked. Second restart had alerts and would not allow me to shift the Jeep out of "Park". I let it sit for a while and then restarted the Jeep with some alerts but with the ability to shift our of 'park' into 'reverse' and the power steering was working; thinking I should take advantage of what I had working I proceeded to work. The first time this happened I sat in a turn lane for 30 mins trying to get the Jeep running and out of "Park"

The jeep has spent 3 work weeks at the dealership with no success in resolving the issue. I am still under the 60K power train warranty but I was told that does not cover these issues, even though the alerts indicate multiple drive train issues "Service Shifter" and prevent the car from being reasonably driven, so I have paid hundreds of dollars out of pocket with no fix.

The Jeep is 4 years old, still under power train warranty, but is basically untrustworthy and therefore substantially unusable.
I'm the only one who rides around in it. My wife and daughters don't trust it. I can't drive my kids and other kids to sporting and recreational events.

The dealership has no ideas, they say they can see log events of what has happened but have no diagnostic error codes to indicate cause.

I am basically stuck with a $50,000 vehicle that no one knows how to fix, and I can't in good conscience sell. I've thought about trading it in but the next dealership will just pass it along to some unknowing buyer.

Anyone have any good ideas?

Have you replaced the green and white can bus behind the glove box. Had simular issues with my 2018 Rubicon, wenr on Ebay bought both green and white bcan bus for about $110. Replaced them myself and have had not one issue for about 5 months now.

 

[TBHIII]

I have a 2018 Jeep Wrangler, built July 2018, which started having electrical issues this past November (2022) and have gotten worse effectively limiting the use of my Jeep to near home, low risk trips (groceries, commute, but not airport).

The Jeep periodically (1 out of 5 trips) has what I can only describe as an electrical storm where all the dashboard warning indicators illuminate, power steering (sometimes) shut downs, "Service ABS" indicates failure, "Service Electronic Stability Control", "Stop/Start Unavailable Service Stop/Start System", "Sway Bar Disconnect Unavailable" indicates failure, "SERV 4WD", parking break light comes on (brake off), check engine light illuminates, airbag indicator light illuminates, , seat belt indicator (while wearing), AutoPark disables, ParkSense "Off", Blind Spot Alert "Unavaible", "Service Shifter", etc. Sometimes the engine fans spin up as if the vehicle is overheating.

This morning on my commute I had this occur and pulled off to the last parking lot before the interstate, as I did not want to drive on the highway without power steering. Once parked the first restart resulted in all the alerts presenting again, not sure about power steering as I was parked. Second restart had alerts and would not allow me to shift the Jeep out of "Park". I let it sit for a while and then restarted the Jeep with some alerts but with the ability to shift our of 'park' into 'reverse' and the power steering was working; thinking I should take advantage of what I had working I proceeded to work. The first time this happened I sat in a turn lane for 30 mins trying to get the Jeep running and out of "Park"

The jeep has spent 3 work weeks at the dealership with no success in resolving the issue. I am still under the 60K power train warranty but I was told that does not cover these issues, even though the alerts indicate multiple drive train issues "Service Shifter" and prevent the car from being reasonably driven, so I have paid hundreds of dollars out of pocket with no fix.

The Jeep is 4 years old, still under power train warranty, but is basically untrustworthy and therefore substantially unusable.
I'm the only one who rides around in it. My wife and daughters don't trust it. I can't drive my kids and other kids to sporting and recreational events.

The dealership has no ideas, they say they can see log events of what has happened but have no diagnostic error codes to indicate cause.

I am basically stuck with a $50,000 vehicle that no one knows how to fix, and I can't in good conscience sell. I've thought about trading it in but the next dealership will just pass it along to some unknowing buyer.

Anyone have any good ideas?

I have recently run into this exact same problem - like exactly down to your description about your wife and daughters not trusting the vehicle. Did any of the suggestions provided solve your problem? I read somewhere that it could also be the TCM. I'm trouble-shooting as we speak and I have replaced both batteries and the alternator already.

 

[thurston]

I've been plagued by this for 6 months and I think I've got my problem solved. I think it is my sway bar disconnect module shorting the high speed CAN bus.

Details are in this thread:

https://www.jlwranglerforums.com/fo...rical-issues-with-power-steering-loss.135444/

 

[KMAlcorn]

My husband had the same issue with his 2018 JL but you have to remember its the glovebox that is causing the issue with the wires in the first place so if you dont fix the glovebox issue then the problem will eventually come back.

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