TPMS failure

[CBari]

I have a new 2024 3500 and while driving it in the rain for the first time last night all of the TPMS began failing and loosing signal one at a time till they all failed. Took about 45 mins of driving in a steady to hard rain. During the last 45 mins we ran out of the rain and the road dried out and the TPMS began coming back on line till all but the front axle was on. This morning they were all back on. I figure a harness isn't plugged in good any idea where to start?

 

[sag2]

Check under the back seat and see if you have any water there. RF Hub is mounted behind the seat.