Hey Brizbarn, Correct, tail light should be powered through the appropoite connector on the headlight. I believe the tail light has a lower power requirement than what the dynamo provides.
I attached a diagram that is the same wiring scheme as my bike and what your message discribes, its easier for me to understand if I draw it than to write it out (electrical peeps, forgive me for the + and -). Sounds like what you described would work though! You can pull those little red caps off the ring terminals (loop crimp) and use heat shrink for a cleaner look. The connections can be soldered or crimped in place. Christian Phoenix, AZ On Thursday, May 25, 2023 at 4:45:37 PM UTC-7 brizbarn wrote: > Hey Christian and Matthew, thanks for the posts. Wow, that frame routing > looks great Matthew, didn't realize you could go through the chain stay, > good work. I'm planning something very similar, but not sure I'll go > through the frame. B&M IQ-XS front light, B&M U, My, Mini (whatever it's > called) rear, with Shutter Precision hub. > > Some follow up Christian: My understanding is that you should not power a > rear light straight from the dynamo hub, but rather from the front light. > Not sure if that is what you meant. My thought was to use the existing > spade connectors from front light (you can see in first pic), ground one of > those to the front rack, and run one strand of Velo Lumino thin wire to > rear light via the other spade connector. Then connect it with a spade > connector to the rear light, and ground the rear light to the frame (via a > rack eyelet where I'll be mounting the light). You said running two stands > of Velo Lumino wire is more straight forward, but do you think my plan > would work? > [image: IMG_0129.JPG] > [image: IMG_0131.JPG]for reference: Left is Velo Lumino 22 wire. Right is > B&M double strand. If I need to run two strands of Velo L wire from front > to rear light, its not much thinner than running B&M double strand, just > more pliable and better insulated is my understanding. > [image: IMG_0133.JPG]for reference in this pic: B&M double strand wire > with spade connectors, two spade terminals, a banana connector, a loop > crimp for grounding. > > > On Thursday, May 25, 2023 at 1:46:41 PM UTC-7 christian poppell wrote: > >> Hey Matthew, >> >> I’m replying on my phone so apologies in advance for any typos or >> non-standard formatting. >> >> Running two wires to the taillight from the dynamo is probably the best >> and loner straightforward way to do it. It’s a closed system and easy to >> track down any issues if they arise. >> >> I’m not sure which model B&M light you have but you can certainly try >> grounding one side of the dynamo and one side of light to the fork and >> frame respectively. I’ve heard the anodizing on some higher quality >> cartridge bearing headsets (Chris King, etc) can prevent the continuity >> between the fork and the frame. In the past folks have suggested removing >> the anodization around the neck of the headset cup to allow current to pass >> through. It’s easy to check for continuity between frame and fork; set a >> multimeter to resistance (ohms) and touch one probe to bare metal on the >> fork, and the other probe to bare metal on the frame (eyelet or dropout >> works well). If the needle or number is close or on zero you shouldn’t have >> a problem. If there’s no change in reading then you don’t have continuity, >> probe around and start troubleshooting :) >> >> Splitting a single length of Velo Lumino wire into two and adding spade >> terminals would not work, right? >> >> >> Not sure what you mean by the above. The Velo Lumino wire that I have is >> a single strand. One of the headlight companies includes a two stranded >> 22ga wire that can be split into single strands. The insulation on that >> wire is less durable and larger in diameter making it difficult to pull >> through small holes. One strand is black and the other is white, bare wire >> is copper. Is that the wire you’re referring to? >> >> The wire Velo Lumino sells is thin (22ga?) and has a tough but thin >> insulation that is much smaller in diameter to hardware store wire or >> anything else I’ve found. I find it easier to work with compared to the >> coaxial wire Schmidt uses on their lights. >> >> In the next few months I’ll be reconfiguring my lighting setup. I can >> snap some photos and draw some diagrams if you’d like some more detailed >> information on how it’s configured. >> >> Hope that’s helpful! >> >> Christian >> Phoenix, AZ >> >> >> On May 24, 2023, at 15:08, brizbarn <brizba...@gmail.com> wrote: >> >> Christian, thanks for the pics and example. I have some of the Velo >> Lumino wire. With a a B&M light, would I need to run two wires to a rear >> B&M light? Or do something similar to what you show in your pics, >> grounding to the frame on both the headlight and taillight ends, and just >> running one length of wire to the rear light? Splitting a single length >> of Velo Lumino wire into two and adding spade terminals would not work, >> right? >> >> >> On Monday, March 27, 2023 at 9:57:03 AM UTC-7 christian poppell wrote: >> >>> Hey Matthew, >>> >>> Smaller wire is fine. The wire that Velo Lumino sells is perfect. Any >>> 22 or 24gauge multistrand wire would work but the Velo Lumino wire is >>> flexible and has very durable insulation. You could also seperate the BM >>> dual strand wire. The insulation is thicker and less durable but works >>> fine. >>> >>> If the hole diameter is too small to pull two wires you can ground >>> through the frame. Ground one side of the dynamo to the fork eyelet >>> https://photos.app.goo.gl/xBqTJ575zxQkeUC49 then ground one side of the >>> light to the mount or other hard point >>> https://photos.app.goo.gl/wPGMviZF9n5cYycn6. Run a single wire through >>> the fork and connect to the light. >>> >>> Hope that makes sense! I can draw up a diagram if thats helpful. How >>> much wire do you need? I might have some to spare if needed. Also what >>> light and dynamo are you using? >>> >>> Christian >>> Phoenix, AZ >>> >>> On Wednesday, March 22, 2023 at 9:53:38 PM UTC-7 Matthew Williams wrote: >>> >>>> Hi everyone, >>>> >>>> In the weeks to come I’m going to be revisiting the >>>> wire-inside-the-fork trick. However, the hole is too small for the >>>> existing >>>> dynamo wires and I do not want to enlarge the hole. >>>> >>>> What would happen if I used a smaller-gauge wire inside the fork, to >>>> connect the dynamo to the headlight? >>>> >>>> Will a smaller-gauge wire be unable to handle the voltage/amperage from >>>> the dynamo? Will the headlight and taillight outputs be weaker? Or will >>>> the >>>> difference between the existing/stock wire and a smaller gauge be >>>> imperceptible? >>>> >>>> As always, your wisdom, advice, experience, and opinions are >>>> appreciated! >>>> >>>> On Sunday, November 20, 2022 at 10:13:40 PM UTC-8 Matthew Williams >>>> wrote: >>>> >>>> Hi everyone, >>>> >>>> Most bikes I see with the SON dynamo have the wire wound around the >>>> right front fork blade. I want to run the wire inside the fork using the >>>> small hole near the dropout. >>>> >>>> I’ve already fished a thin wire through the fork as a leader i.e. I can >>>> attach the leader to the SON dynamo wire and pull it through the fork, >>>> unless the dynamo wire is too thick. Below are photos of the leader wire I >>>> fished through the fork. >>>> >>>> Is this possible, or is it a bad idea? Has anyone here managed to >>>> achieve this setup? If so, how did you do it, and please post photos of >>>> your internal wiring setups! >>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to rbw-owners-bun...@googlegroups.com. >> >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/rbw-owners-bunch/d083f8ad-ec98-449c-b551-06731adaab24n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/rbw-owners-bunch/d083f8ad-ec98-449c-b551-06731adaab24n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/3025a489-fcf8-42ef-ad05-4dd192067389n%40googlegroups.com.
