07 JKU instrument cluster issue when going over bumps

[mjbennett78]

Hello everyone,
I just joined this forum in hope that someone can help.
My jeep has had a problem for a couple of months now. When I hit a bump, doesn't seem to matter severity or speed, my chime goes off, the RPM gauge drops and returns to normal one or several lights flash on and often some will stay on. The oil, check engine, airbag and ESP/BAS lights specifically. This happens at highway speeds or crawling through a parking lot, pot hole patches, speed bumps, cracks in the road or the gaps left in the pavement of a parking lot. It doesn't happen on every bump however.
I'm at a loss for where to go or what to check.
Sometimes the check engine light stays on and I can pull DTC codes, U0002, U0100, U0101, C107D, U0141, U0146. Other times when checking codes I get nothing on the DTC but using the ABS code function I'm able to get U0002, U0101, U0141, U0146, U0100, U0429, C017D.
Typically all the codes and lights clear when you shut it off only to pop up again at some point.
Could my instrument cluster be on it's way out? CANBUS problem?
I'm frustrated and about to flip this thing into a bar ditch and set it on fire.

 

[BLACKJKU]

Best thing to do is start with the battery, ditch the junk Factory clamps, clean the terminals good. Then clean engine grounds, body grounds and especially check the grounds that are at the kick panels. One of them could be loose or broken which kinda sounds like your problem since it happens with bumps.

 

[mjbennett78]

Best thing to do is start with the battery, ditch the junk Factory clamps, clean the terminals good. Then clean engine grounds, body grounds and especially check the grounds that are at the kick panels. One of them could be loose or broken which kinda sounds like your problem since it happens with bumps.

Thanks for the tip.
I ditched those junk battery connections years ago and have recently put new ones on and cleaned them so I'm sure that's not the issue. I've been poking around looking for a diagram for all the ground locations so I can tackle them all at once but no luck so far. I know where the obvious ones are but I'm sure there are others stuck all over the vehicle. I'll give them a run over with a wire brush and make sure they are tight.

 

[BLACKJKU]

Here are some that I have on this Forum in the Resources Section.

https://wranglerjkforum.net/threads/jk-and-jl-factory-service-manuals.29798/

This one is from the last link.

file:///C:/Users/12602/AppData/Local/Temp/Temp1_2007-20230727T104051Z-001.zip/2007/wiring%20diagrams.pdf

 

[mjbennett78]

Well, I cleaned all of the grounds I could find in the cab and engine bay except for the 2 next to the cat on the passenger side and pulled out all the wires and stuff for my old busted auxiliary light on the front. I got a 10 mile or so round trip without any incidents of dings or dash lights coming on. Electrical issues melt my brain, fingers crossed it was an easy fix.
Thanks for the tip and pointing me towards the resources.

 

[BLACKJKU]

Well, I cleaned all of the grounds I could find in the cab and engine bay except for the 2 next to the cat on the passenger side and pulled out all the wires and stuff for my old busted auxiliary light on the front. I got a 10 mile or so round trip without any incidents of dings or dash lights coming on. Electrical issues melt my brain, fingers crossed it was an easy fix.
Thanks for the tip and pointing me towards the resources.

Thanks for the update hope that's what the problem was. Yes there's tons of valuable info in the Resources Section.

You could also run another ground from the battery to the block and firewall, just for extra insurance.

 

[Dirty Dog]

Well, I cleaned all of the grounds I could find in the cab and engine bay except for the 2 next to the cat on the passenger side and pulled out all the wires and stuff for my old busted auxiliary light on the front. I got a 10 mile or so round trip without any incidents of dings or dash lights coming on. Electrical issues melt my brain, fingers crossed it was an easy fix.
Thanks for the tip and pointing me towards the resources.