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  • Hoping someone can help me diagnose a problem as I'm unsure as to which part of my lighting setup is broken :|

    I returned a Luxos U after it wouldn't stay on for more than 5 minutes, replaced with an Edelux 2 which I just tried to connect to the SP-8D hub (and B+M Secula rear-light) today.

    No light anywhere :(

    I dug out a multimeter that I don't really know how to use and found:

    Hub: Continuity across the connectors, but no output at high speed, with ~2.5 output at low speed/just about to stop. (multimeter set at 200v AC - bike in the workstand)

    Edelux No continuity at the ends of the dynamo cable. Continuity at the rear ends of the output/ground cable.
    Secula No continuity across the light connectors.

    I should be at least getting continuity at the Edelux's dynamo connectors, shouldn't I?

    I did (foolishly) connect the rear up before testing the front alone. Is it possible that I've wired up the Secula the wrong way round and blown everything? There's no polarity marks on the Secula :(

    Any advice would be deeply appreciated. I have no idea what I'm doing.

  • You shouldn't get continuity at the lights connectors as that would imply an open circuit, whereas the the light need some kind of resistance in order to provide a load.

    What do you mean by 2.5 output? V? You need to see whether your multimeter is giving you an RMS value which should help things. Seems odd that it would not give a reading at high speed.

  • Ah that's cool. Glad that doesn't mean the lights are wrecked then. Thanks for the advice :)

    Erm, well I don't really know how to use the multimeter but it's similar to this and the settings it has to read Volts AC are 600 and (edit)200.

    My understanding is that you set the multimeter to the next rating up from the output you expect. So in this case I had to set it to 400 and as the hub was stopping, 2.5 flashed up on the readout.

    It feels like the hub might be dead if there's nothing when it's rotating at speed...

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