this post was submitted on 27 Dec 2025
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I have a Roxim Z3EK bicycle headlight. This light is supposed to have a low and high beam function, but I can only get the low beam to work. So far, I have tried:

  • grounding the green wire
  • sending 12V+ to green
  • sending 12V- to green
  • bridging the green and black wires
  • bridging the green and white wires

I emailed the manufacturer asking for a wiring diagram, but no response.

I appreciate any guidance y'all might have. Thanks!

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[โ€“] Xbeam@lemmy.world 5 points 1 month ago (1 children)

It's possible the green is a data wire. The light might start in low by default and be looking for a change state to switch to high.

[โ€“] JayleneSlide@lemmy.world 2 points 1 month ago

Oh! That is an angle I didn't consider. I'll start looking into possible signals I can send. Thanks!