Picture of Brake Lights for Bikes
2013-07-10 12.04.04-1.jpg
This is a really easy weekend project that you can do to give your bike some brake lights.
Remove these adsRemove these ads by Signing Up

Step 1: Get Your Parts

Picture of Get Your Parts
2013-07-10 12.04.42.jpg
2013-07-10 12.05.05-2.jpg
Get the parts that are needed: 

     Lots of Zip-ties
     Copper (I used some 14 gauge Romex I had around my house)
     Tail light (I used a Planet Bike Blinky 3 that I have been using for years on my bike)
     Soldering Iron

Step 2: Take Your Stuff Apart

Picture of Take Your Stuff Apart
2013-07-10 12.16.13-1.jpg
2013-07-10 12.15.57.jpg
2013-07-10 12.05.36.jpg
Take apart your tail light. We are needing inside in order to rewire it to work with your brakes.

Step 3: Bend Switches For Your Brakes

Picture of Bend Switches For Your Brakes
Take your Romex and bend it into a switch that you can zip-tie to your brakes. Solder one end of your wire to the end of your Romex.

Step 4: Zip-Tie Your Switches to Your Bike

Take your newly soldered switches and zip-tie it to your bike. I have disc brakes on my bike, if you have a different style of breaks I'm sure that a quick re-work will suffice. 

Step 5: Re-wire The Tail Light

Take the battery connector closest to the power button (we are going to be running our wires through here later) and cut it in the middle. This is where we are going to add our wires from our switches. 

Step 6: Zip-Tie Everything Up and Attach it to Your Bike

Picture of Zip-Tie Everything Up and Attach it to Your Bike
2013-07-10 12.54.08.jpg
2013-07-10 12.53.49.jpg
2013-07-10 12.53.43.jpg
Zip-tie your wires to your break lines and make sure to leave enough room that you can turn your handlebars right and left without it catching on your wires. Test it out and make sure that everything is working as it should. 
shivam kale4 months ago
jkoyne4 months ago
Awesome idea.

This is awesome and simple, how are there no comments? If you tap your brakes twice and hold, does the light start blinking? :)

That is a cool idea. Will do it in few days but wont fixing it at the brake handles be a much more better? I mean, will omit the unnecessary extended wiring. Especially down the fork.

But good job!

Joceyvdv2 years ago
Lol ^^ seriously you should go on shark tank xD improve it though, too look more professional lol Btw, when you said to get the battery connector closest to the switch, will that override the switch? I have one think it's a bell light and it has 4 modes and the 3rd mode is the mode where the light stays, but when I put it on that mode and I test it out by touching the wires it works, but soon after a couple seconds later the light turns off, and idea?
JillWood1232 years ago
I work at a bike shop, patent that and get it on shark tank. :)
samrianv2 years ago
Clever idea but because there is so much bare wire do you find the batteries bleed out quickly?
tomatoskins (author)  samrianv2 years ago
The only time that current is running though the circuit is when the breaks are applied. There is no reason that the batteries should die quickly at all.
tomatoskins (author) 2 years ago
I didn't know that. I'll have to take a look. Thanks for the heads up!
You can buy v-brake levers (also work with cable pull discs) that have electric switches in them. They are sold for electric bicycles, as cutout switches that activate when braking, but can be wired to engage light systems.
mcraghead2 years ago
Very cool. Absolutely on my to-do list!
madushan922 years ago
great! Thank you. Should try this whenever I am free!
vicesat2 years ago
Very clever, i like it