@AlanRail posted:you found the problem a short between the truck and frame.
assembly issues or production problem. The tolerances are very close so sometimes . . . . a spark!
Solution: either slightly bend the metal away so the short goes away or cover it with an insulative material.
I am pretty sure that it is more like a short between the rear can motor and the black frame.
The weld spots are on the base of the can motor, and as I think about that, I see what you are saying.
The can motor is part of the truck.
If I knew how to get the truck off of the frame, I could easily Dremel out a bit of that frame.
