I have successfully taken apart my Big Hauler passenger car to access the two lights in the ceiling. One of them is apparently burned out. My problem is that I cannot figure out how to remove the bulb to test it and replace it if bad. Does anyone know, do the bulbs unscrew? Can't really get much of a grip on it to turn it and I am afraid I will break it in the process. It is almost entirely inset into a plastic light diffuser which makes it hard to grab. By the way, thanks to you who helped me rewire the 4 wheel truck on my Baldwin engine. After some minor modifications of the chassis, I put it all back together and it now runs like a charm.