Just posting more for awareness as this may also apply not only the Halloween caboose recently released with the LED Lights but also assume similar design with the Christmas Caboose.
Ran this caboose last night and worked out of the box without any issues. After running for a few laps around the layout the transformer tripped. Did not know what had happened but then figured out that the root cause was associated with this caboose.
I also could smell a slight electrical burn type smell.
So I took the caboose apart which there are 4 screws holding the base to the shell.
Once removed I looked for an obvious issue.
Ultimately what I found and tried to show in the pictures is that the one wire from one of the trucks was directly underneath the board as seen in the picture. I was unable to push the wire free. So I then removed the screw holding the board to the frame. Once I did this you could see the melting of the wire and then on the underneath side of the board you can see the brown (over heating) of the board. Prior to removing the board it was bend downwards compressing the wire to the metal frame and ultimately this led to the failure.
Only recommendation is
1.) Take the initiative to take your caboose apart prior to running to ensure the board is not bend downwards onto the metal frame and/or wires are not also compressed between the metal frame and the board.
2.) You can monitor the caboose for flickering but once it shorted it shorted and you will be where I am with a non working caboose.
Added some pictures to high light the failure
Then the pic of the screw and the plastic piece that sits between the board and the frame to keep the board above the frame. But again in my case it was bent downwards compressing the wire and making contact with the metal frame.
Will also notify MTH and hope to get the replacement board and be back to working.
Just posting as FYI as the design should not cause this issue but in my case the board was bend/angled downwards as previously indicated. An easy inspection you can perform to ensure no future issue.