I recently bought a bakfiets with a Nexus generator hub. Interestingly, when you search for "Nexus" on this forum, a thread from someone else who bought a bakfiets with a Nexus generator hub comes up. He also seemed to have a burned out bulb and it war recommended that he gets a new light rather than just a new bulb. OK, I'm on board with that.

Hub is HB-NX23, and a Google search didn't turn up much. It's a single wire design with a spade connector. Shimano's website found doucmentation, but only in Japanese, and it wouldn't let me download it anyway. I turn the wheel, and there's no light. The bulb has a frosted, knobbled texture, so I can't see the filament, but it looks intact, I'm just making the assumption it's bad because that's the most obvious. However, before I invest in a new light, I'd like to be sure.

How do I test to make sure my hub works, first? What do I put the little tester leads onto?