2015 Cascadia bunk light stays on

I'm in a 2015 Cascadia. This morning the bunk lights would turn on and off on there own and at random as I was driving. Now the top left bunk light stays on and the switches in the sleeper don't work. The bunk light switch on the dash will turn the center bunk light on & off without turning off the one stuck on.
Any ideas or advice besides torching this plastic rattle trap?

 

I tried the top switch and nothing happens. The 2015 does have a toggle switch that will do just the center light also. I'm wondering if the A/C vent sweating has shorted out the switch up top and is causing the problem.

 

When I push the bottom of that switch the two outer lights come on, when push up the mid comes on. There is another switch next to it that you toggle up to get the small, lower light on & off.

 

Yep.
The truck is a Ryder National Lease unit. I called them and the mechanic said they're having problems with the AC vent condensation from the upstairs vent getting into the switch and causing a short. He's going to bring a switch out and see if it fixes it. I'll update when he's done.

 

The Ryder tech replaced the lower light switch. The switch with the bunk mute and two light switches. That fixed the problem. Apparently moisture is getting in the switch shorting it out. When he pulled it you couldn't see any signs of damage, but it was keeping the circuit closed for that one light.
It took 197,000 miles to get enough moisture to ruin the switch. Maybe this one will last until we turn the truck in for another lease.

 

Apparently the above fix was a bandaid on something larger. Now the bunk lights are stuck on, the engine brakes will not come on despite the yellow light on the switch being illuminated, the row of switches that the dome light & eng brake are on have started flashing on & off, while accelerating or pulling a hill the speedometer will fall to about 15 MPH and the truck will derate until the speedo starts climbing back up then I'll get fuel to continue accelerating. All this has happened at the same time.
Again, Ryder is sending a "tech" out.