Dash turned into a Xmas tree.

[Boatman22]

Driving on the interstate this morning running about 70 and the dash went crazy. Everything started flashing and bells going off. The truck ran fine until I slowed down in the slow lane. Wipers started going, no tach speedo nothing on the dash read except the all warning lights still going off. Got off on my exit slowed down to make a turn no power steering and could not go over 25 mph. Stopped turned the truck off, restarted and everything fine. Got about a mile and everything start going off agai, but this time The dash had No CanBus. Got home and the the shift knob would not work and the truck would not turn off. I keep pushing the on/off and it finely turned off. Put an code reader on to clear code and had 43 DTC! Cleared all the codes started the truck and all the lights started and bells light started going off again. Any suggestion an what to start checking? 2023 1500 DT 5.7 10700 miles.

 

[mikeru82]

I would first load test the battery. If that checks out I'd probably look for signs of water getting into the cab either under the dash or the cab wall behind the rear seat.

 

[Boatman22]

I did check behind the rear seat and no signs of water or moisture. I have the battery disconnected at the moment to see if that helps. If I will get the battery load tested.

 

[kapinallinen2]

Yup. I would be like a fly on stink checking the back for water intrusion/damage to the RF hub.
edit: you already did that.

 

[kapinallinen2]

I did check behind the rear seat and no signs of water or moisture. I have the battery disconnected at the moment to see if that helps. If I will get the battery load tested.

There was a thread about something going on with the CAN bus connectors under the dash. Tried search, got no hits...

 

[Boatman22]

I search Can bus but got nothing

 

[kapinallinen2]

I search Can bus but got nothing

Same here.