Bicycles Asked on July 22, 2021
I recently got a bike with a Yamaha PW system. The bike computer has a light on/off button but the bike itself has no light and I want to add one. How do I do this? From what I understand, I need a light cable, some sort of crank pulling tool to open the motor, plus the light itself.
My question is where can I learn about the detailed procedure for doing this?
Okay, so I did some research into this and here's what I found:
So I've ordered the light and the Light Cable to connect it to.
Update: did the entire installation process, here are the approximate steps I had to take.
To sum things up: the process of light installation is rather annoying, but manageable.
Correct answer by Dmitri Nesteruk on July 22, 2021
What you're describing is totally possible, but I don't think its very practical. I suggest you buy a standard set of rechargeable bike lights from your local bike shop, or online. Installation should be pretty self-explanatory. You just strap them to your handlebars, and charge them in once a week.
I personally use this light from NR.
Answered by AVA on July 22, 2021
OK, just added Lezyne E50 and Hecto rear fender lights to a Giant Lafree E+2.
Like others have said, remove two motor mount bolts and let it pivot on the third bolt:
Then pull down the connectors out of the down tube; this shows two unconnected connectors; a three pin and a two pin rear light connector (JST 02R-JWPF-VSLE-S 2 pin receptacle) with a white (+6V) and a grey (GND) wire:
Note you will have to remove the white rubber cover before connecting to this two pin connector. You will have to draw the wiring further down the down tube to reach the front connector; its near the round handlebar control plug right up at the top shown with my light (yellow and black wires) connected:
After pulling the wires down the down tube for front light, and following the wiring up fender for the rear, then it just remains to terminate the wires grey to GND and white to +6V with a 2 pin JST JWPF plug (02T-JWPF-VSLE-S) using JST SWPT-001T-P025 crimp pins:
Put your bike back together, and now the lights work from the front handlebar switch!
... hope someone finds this useful.
Answered by Rod Badcock on July 22, 2021
So this is pretty straightforward on the Giant Roam E+.
There is a wire harness that you can access at the top of the frame just below the battery. There is a small cap. In there you'll find three wires. One is a mini style jack to connect the control switches. The other two one is yellow/gray and is 6 volts switched to the light switch, the other is purple and black. This wire reads 40 volts DC, stay away from this one, not sure what it does but it is live all the time, even with the battery removed (I suspect for a short time only) it still has voltage.
The Lezyne light is about 7 watts and the tail light about a watt and a half. The limit for this circuit is supposed to be 9 watts.
I know there are harnesses out there to plug directly into this connector, but splicing is easy if you have the right tools and connectors.
Answered by looknow12 on July 22, 2021
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