I have the above locomotive and it has a small issue. The flickering firebox doesn't flicker. I checked the bulb, and it's fine. I don't see any obvious wiring issues while looking around. I tried the reset from the manual, that didn't change anything.
What does that light actually connect to, I have no wiring diagrams, and I've never tracked this down before. It must have some circuit that imparts the flickering, just wondering where it gets it's power.