harshaw
New Member
I have a Giant Quick e+ 2018 and wanted to upgrade my light with a Lupline SL. It's a yamaha syncdrive sport system with a custom wiring setup that is a bit different than other e-bikes. The Yamaha cable https://www.lupinenorthamerica.com/item.asp?cID=0&PID=568 doesn't work because it comes with a male connector but the giant needs a female connector. Fortunately, the Giant comes with a stock light that has an existing cable. You do NOT need to take out the engine to get at the wiring harness. What I did to make this work:
Tools you will need: screw drivers, lighter or heat shrink gun, soldering iron, heat shrink tubing (mixed sizes)
The SL is a vast improvement over the stock light. It's brighter, has a cut off similar to automobile lights, focuses the light on the lane, and has automatic blinking daytime mode.
I did search around for a cable that had the right connectors and couldn't find one. It's possible that Giant and/or Lupine will start making the correct cable. It's also possible that you could purchase the JST connectors and a crimping tool and make the cable correctly without splicing. I just didn't know how to do that.
Tools you will need: screw drivers, lighter or heat shrink gun, soldering iron, heat shrink tubing (mixed sizes)
- Pull the existing light wiring out of the downtube until the JST connector is visible.
- Pop out the JST connector using a small screw driver.
- Using a wire cuttter, cut off half of the existing wiring. You want the part with the female JST connector.
- Cut off the male end of the JST connector on the Yamaha wire (https://www.lupinenorthamerica.com/item.asp?cID=0&PID=568 ).
- Install the new cable in the lupine light following the directions on the packaging.
- Install the light. In my case I had to move the Giant / Yamaha LED screen to make space for the light.
- trim the light cable to the desired length.
- Expose the red / black conductors using a wire stripper.
- Get a package of heat shrink. Heat shrink provides a water proof seal on wiring. You can shrink the heat shrink using a lighter.
- Get a larger piece of heat shrink and put it over the cable. This is so you can shrink the entire cable in step 14.
- Cut some smaller pieces of heat shrink and slide them over the black and red wires.
- Solder the black to black, red to red
- Using a lighter or heat gun, shrink the heat shrink around each conductor.
- Slide the larger heat shrink over the two conductors. Using a lighter or heat gun, shrink the heat shrink.
- Plug in the JST conductor into the Giant wiring. Push back into the downtube.
- Turn on the power and enjoy your new light!
The SL is a vast improvement over the stock light. It's brighter, has a cut off similar to automobile lights, focuses the light on the lane, and has automatic blinking daytime mode.
I did search around for a cable that had the right connectors and couldn't find one. It's possible that Giant and/or Lupine will start making the correct cable. It's also possible that you could purchase the JST connectors and a crimping tool and make the cable correctly without splicing. I just didn't know how to do that.
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