Dash lights and battery change

[SCarpenter]

Looking for advice, changed out my batteries on my 2020 Rubicon 12500 miles. Aux battery was going bad, then main died, had to jump truck and after that the abs, traction control and service 4wd lights came on. Replaced both batteries thinking that they created the issue but the lightso are still on. is there something else to check or is it a trip to the dealer?
Truck runs fine otherwise.
Thanks in advance....

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[Hootbro]

Check your F34, F100 and F106 fuses to see if they blew. Those all power feed your ABS module. I think you have just one issue and the others are just cascading off each other.

I assume you did not get your jumper leads crossed? Was the MIL on and is there any codes?

Beyond that, there is a bunch of stabbing guesses but someone with electrical skills needs to put eyes on it, so it may be a dealer thing.

 

[SCarpenter]

Check your F34, F100 and F106 fuses to see if they blew. Those all power feed your ABS module. I think you have just one issue and the others are just cascading off each other.

I assume you did not get your jumper leads crossed? Was the MIL on and is there any codes?

Beyond that, there is a bunch of stabbing guesses but someone with electrical skills needs to put eyes on it, so it may be a dealer thing.

Thanks, i opened the fuse box and was not sure where to start!
No issue on the jumper box start

 

[ShadowsPapa]

Thanks, i opened the fuse box and was not sure where to start!
No issue on the jumper box start

Something too many fail to keep in mind - if you change the batteries yourself, you don't take the two black ground leads that connect to the IBS on the main battery negative terminal apart and thinking with the cable off the main battery, the positive was safe, you can end up grounding it and blowing one of the high current fuses (N3, which is how the aux battery gets charged).
It's a fuse in a whole array of fuses, it's not in the PDC, you can't pull it out and look at it, it's at the driver side end of the PDC, and it's several big fuses in one array or assembly.

I've lately seen two people who said they replaced both batteries and then after that, weird things happened, lights came on, things stopped working. They do it like it's a 1970 Camaro with one battery. It's not, there's two and the ground from the aux battery is tied to the main battery. If you don't take those cables apart, when replacing the main battery, the aux is still very connected to that red cable on the main battery - it's not dead, it's HOT.
One guy said "I didn't spark it" LOL - had to laugh. Spark indicates it's too late, you already made contact as the spark results as pulling a cable AWAY, not making initial contact, and if the fuse blows, of course there's no spark. He was like "it didn't spark so it can't be that". Yeah, it may not have sparked because the fuses blew and there was no longer current to cause the spark when the cable was pulled away. People get things backwards - sparks result from losing contact, not making contact, and if the fuse is blown, of course there won't be spark when you pull that positive cable away from the ground it touched. In other words (I could say - "in short" LOL) no spark may mean more trouble than seeing a spark.

But for just the ABS, if that's all that's acting up or showing a fault light - look at the map of fuses in the cover you pulled off the PDC - it lists each fuse, what it's for and where it is in the PDC/fuse block.

If it's not a blown fuse that you can check as hootbro laid out, then you need to take it to a pro - the dealership. The guy knows his stuff and has provided useful info.

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