Have you tried to connect the Lumotec by itself, without the taillight ?
(Don't spin it too fast, however, because the zeener diode won't limit voltage adequately unless you have either a 3 W headlight or the taillight attached.)


What switch do you have?

The installation I have on my commuter is with the Dynohub and the standard (round) Lumotec with a built-in switch, rather than the light-controlled switch sold by Shimano. No problems with the instructions provided earlier.

If your setup uses the Shimano switch, it should be on the live wire, not on the ground. Anyway, to try to pinpoint the problem, install the headlight on the bike, but wire it directly without the switch to see if things work.

Another factor to note: one model (sole model?) of the Shimano switch is light sensitive. Make sure light doesn't play a factor...


Finally, unless you spinned the hub for a long time, it should still work. Don't connect anything on it and check with a Voltmeter to see what happens.


P.S. I'm afraid it might be a good idea to get in touch with an electrician or at least someone who knows a bit...