I have the Schwinn Vestige and a very long, bumpy, dirt/gravel driveway.
A few weeks ago, we rode downtown and the frame lit up amazing, as it should. On the way home, it was not lit up. Hmm.
After a tiny amount of investigation, I found the cap and cover was missing (I mostly blame the driveway). I ordered a new one (a mere 7 dollars) and installed it. But alas, the frame still would not light up.
I clipped and stripped the wire from the LED's to the cap/cover thinking they may have been gunk-ified and re-installed the cap/cover. Nothing. I switched the red and black wire within the cap/cover. Still nothing.
I tested the electrical output from the Shimano DH-3N30 Dynamo hub and all is good. Still no lights. I pulled the generator/wires out from the frame to inspect for damage and, as expected, there was none.
I am at a total loss.
The local bike shop admitted I knew more about electricity then they did. I cannot find any advice or schematic regarding how the lights light up nor can I figure out how to test the lights beyond the hub.
(Note that I have not probed the wires in the frame while spinning the wheel to check for connectivity.)