[rikboby]

Hi everyone,

I've been having an intermittent issue with my 2018 Jeep Wrangler JL. It all started a few months ago when I was driving in town and received an alert saying service ABS system. It stayed on for a few days then went away. A couple of days later it came back up along with every other light on my dash; ABS, traction control, parking brake, check engine light, start/stop unavailable, service shifter, and service 4WD. My speedometer doesn't work and sometimes the shifter knob locks up. I did unhook the battery to reset everything and that worked for like a day and the only light that stayed on was the check engine light; then everything eventually flared up again. I replaced the main battery last month and the aux battery last year. I did take it to a Jeep dealership hoping that they had some information but of course, when I took the vehicle in the lights weren't on so they couldn't help me. It had gotten to a point where this was happening intermittently every day then it stopped for about a month. I haven't had any issues and the check engine light was also gone. But today it lit up like a Christmas tree again. Has anyone else dealt with this, if so what did you do to fix it?

This is a picture reference and was taken when driving (the speedometer not working)

 

[aldo90731]

Welcome to the forum!

Possible culprits are:

1. Weak auxiliary and/or main battery
2. Loose fuses
3. Defective canbus connector --sitting behind the glove box

There is a sticky on electrical issues here: https://www.wranglerforum.com/threa...lectronic-and-electrical-issues-common-problems-and-possible-solutions.2450822/

Good luck.

 

[Old Dogger]

Welcome to the Forum!

 

[Metaldog]

Welcome to the forum

 

[Got it at last]

Welcome to the forum.

did you check for codes while the lights were on?

 

[jpcannon]

Welcome to the forum!

Possible culprits are:

1. Weak auxiliary and/or main battery
2. Loose fuses
3. Defective canbus connector --sitting behind the glove box

There is a sticky on electrical issues here: https://www.wranglerforum.com/threa...lectronic-and-electrical-issues-common-problems-and-possible-solutions.2450822/

Good luck.

^^This^^.

 

[Alf1032]

Hi everyone,

I've been having an intermittent issue with my 2018 Jeep Wrangler JL. It all started a few months ago when I was driving in town and received an alert saying service ABS system. It stayed on for a few days then went away. A couple of days later it came back up along with every other light on my dash; ABS, traction control, parking brake, check engine light, start/stop unavailable, service shifter, and service 4WD. My speedometer doesn't work and sometimes the shifter knob locks up. I did unhook the battery to reset everything and that worked for like a day and the only light that stayed on was the check engine light; then everything eventually flared up again. I replaced the main battery last month and the aux battery last year. I did take it to a Jeep dealership hoping that they had some information but of course, when I took the vehicle in the lights weren't on so they couldn't help me. It had gotten to a point where this was happening intermittently every day then it stopped for about a month. I haven't had any issues and the check engine light was also gone. But today it lit up like a Christmas tree again. Has anyone else dealt with this, if so what did you do to fix it?

This is a picture reference and was taken when driving (the speedometer not working)
View attachment 4611005

Can you update on this? How did things turn out?

 

[moabyte]

Can you update on this? How did things turn out?

Welcome to the Forum!

 

[jdusmc214]

Welcome to the forum!

Possible culprits are:

1. Weak auxiliary and/or main battery
2. Loose fuses
3. Defective canbus connector --sitting behind the glove box

There is a sticky on electrical issues here: https://www.wranglerforum.com/threa...lectronic-and-electrical-issues-common-problems-and-possible-solutions.2450822/

Good luck.

Do you know which can bus connector? White or green? Or both?

 

[steve_hoey]

I have the same , lights on regularly ,no shifter, sometimes no pwr steering ,been to 2 Jeep dealerships 5 times, no answers only please don't trade the jeep here . Anyone have the final outcome ?

 

[Camper_Bob]

I have the same , lights on regularly ,no shifter, sometimes no pwr steering ,been to 2 Jeep dealerships 5 times, no answers only please don't trade the jeep here . Anyone have the final outcome ?

This:

Welcome to the forum!

Possible culprits are:

1. Weak auxiliary and/or main battery
2. Loose fuses
3. Defective canbus connector --sitting behind the glove box

There is a sticky on electrical issues here: https://www.wranglerforum.com/threa...lectronic-and-electrical-issues-common-problems-and-possible-solutions.2450822/

Good luck.

But I'll add that I've read that the high amp fuse array can cause squirrely issues like this too.

And you need to ensure all your main battery connections are tight.

 

[steve_hoey]

This:



But I'll add that I've read that the high amp fuse array can cause squirrely issues like this too.

And you need to ensure all your main battery connections are tight.

Thank you for the heads up. I bought 2 new batteries ,very tight and the Jeep dealers that have had the truck 5 different times went through can bus and fuses. I can't even trade it on a new jeep lol.

 

[steve_hoey]

Hi everyone,

I've been having an intermittent issue with my 2018 Jeep Wrangler JL. It all started a few months ago when I was driving in town and received an alert saying service ABS system. It stayed on for a few days then went away. A couple of days later it came back up along with every other light on my dash; ABS, traction control, parking brake, check engine light, start/stop unavailable, service shifter, and service 4WD. My speedometer doesn't work and sometimes the shifter knob locks up. I did unhook the battery to reset everything and that worked for like a day and the only light that stayed on was the check engine light; then everything eventually flared up again. I replaced the main battery last month and the aux battery last year. I did take it to a Jeep dealership hoping that they had some information but of course, when I took the vehicle in the lights weren't on so they couldn't help me. It had gotten to a point where this was happening intermittently every day then it stopped for about a month. I haven't had any issues and the check engine light was also gone. But today it lit up like a Christmas tree again. Has anyone else dealt with this, if so what did you do to fix it?

This is a picture reference and was taken when driving (the speedometer not working)
View attachment 4611005

Mine is the exact same . No fix yet.

 

[Camper_Bob]

Thank you for the heads up. I bought 2 new batteries ,very tight and the Jeep dealers that have had the truck 5 different times went through can bus and fuses. I can't even trade it on a new jeep lol.

What do you mean "went through can bus and fuses"? Did they replace the canbus?

 

[LaniMann]

My jeep is having the same issues. Any answers?

 

[Jurrasic jeep jenny]

Hi everyone,

I've been having an intermittent issue with my 2018 Jeep Wrangler JL. It all started a few months ago when I was driving in town and received an alert saying service ABS system. It stayed on for a few days then went away. A couple of days later it came back up along with every other light on my dash; ABS, traction control, parking brake, check engine light, start/stop unavailable, service shifter, and service 4WD. My speedometer doesn't work and sometimes the shifter knob locks up. I did unhook the battery to reset everything and that worked for like a day and the only light that stayed on was the check engine light; then everything eventually flared up again. I replaced the main battery last month and the aux battery last year. I did take it to a Jeep dealership hoping that they had some information but of course, when I took the vehicle in the lights weren't on so they couldn't help me. It had gotten to a point where this was happening intermittently every day then it stopped for about a month. I haven't had any issues and the check engine light was also gone. But today it lit up like a Christmas tree again. Has anyone else dealt with this, if so what did you do to fix it?

This is a picture reference and was taken when driving (the speedometer not working)
View attachment 4611005

There is a recall on this and a known problem.It's nothing you've done wrong

 

[Jurrasic jeep jenny]

Mine is the exact same . No fix yet.

Known issue BAD CLUSTER need replacement recall JUST ISSUED

 

[Jurrasic jeep jenny]

This:



But I'll add that I've read that the high amp fuse array can cause squirrely issues like this too.

And you need to ensure all your main battery connections are tight.

It's a bad cluster stellantis aware

Recall

 

[steve_hoey]

There is a recall on this and a known problem.It's nothing you've done wrong

Hi there , mine was 100% the same , dealer couldn't fix it as lights would go off. I replaced can bar switch board behind glove box,all good now for 3-4 months.