A forum for owners of Yamaha TTR250 trail and enduro bikes!

rollingstone14 · Member

My brake light won't work

nikroc · Member

Have you checked all the physical/electrical connections?...

TTRfan · Super Guru

I had exactly your problem. Easy fix as I found a broken wire going into a connector wink

barra8 · Guru

rollingstone14 wrote:
Replaced the bulb with a new one, turned the key with fingers crossed and...no luck. Now I have to follow a bunch of wires through a bike and nobody likes doing that.

I would be checking the brake switch at the pedal. This is an open circuit & gets rusty quick. You can fix these by resoldering the connections & cleaning up. Worked for me wink

Another good one would be to use a spare 12V bulb or tester to see where the power ends. Most likely at the switch.

..............................

Jarrah.

-- Edited by barra8 on Saturday 2nd of February 2013 06:28:01 AM

rollingstone14 · Member

Replaced the bulb with a new one, turned the key with fingers crossed and...no luck. Now I have to follow a bunch of wires through a bike and nobody likes doing that.

rollingstone14 · Member

Okay, this is becoming a big pain in the arse. I lifted the seat, and attached the turn indicator wires to the brake light wires and, of course, it lit up fine. I plugged the turn light wires into the brake light wires and no light, thus, it must be the brake light wires right?

I've now spent over three hours playing with it.

Make it end!

PS:

Testing the recommended wiring areas now.

-- Edited by rollingstone14 on Monday 22nd of April 2013 01:58:39 AM

TT-R250M · Super Guru

I noticed from your pro that you are in Canada so I am pretty sure that you will not have the brake light switch needed for it to work. I could be wrong on this & it's only the US models that don't have the brake light etc..? Anywayz...

You will need a brake light switch if this is to work. If you find that you do not have one, there is always the option of an aftermarket hydraulic switch or buying the lever switch that fits to the brake pedal.

The yellow wire that is located under the seat is the brake light wire. This wire should run into the male yellow Bayonet plug that goes to the taillight/brake yellow~yellow . This wire comes out of the brake light switch. The other side of the brake light switch is the power feed for the switch.

Check if you have the brake light switch or wiring necessary- if not, I will let you know how to wire it starting from ''scratch''.

rollingstone14 · Member

Not sure which wire you mean.

Heres a whack of pics.This appears to be the brake switch at the foot pedal

TT-R250M · Super Guru

I see that you have the hydraulic brake light switch fitted. Here is what to do...

First turn the ignition on, now test the red wire using a multimeter or test light. If you do not have one just use an old 12V bulb.

Now, using the multimeter put the red positive terminal on the red wire shown in the picture below as the power feed wire. The other black probe must go to the black earth wire in the pic below. Now- does it have 12-V power? if not trace the fault until you do.

If using a 12-V bulb with socket, connect one end to the red wire & one to the black wire in the pic below. Now- does it have 12-V power? if not trace the fault until you do.

Okay now that you know that you have a 12V power feed into the switch- connect the red wire red~red as it is in the pic below, turn the ignition to the On position, now connect the red probe side of the multimeter (or wire if using a 12-V bulb) to the yellow wire & the other black probe (or wire if using a 12-V bulb). Now press the brake pedal On & Off- Does the multimeter flash 12-V power when pressing the brake pedal down? (or if using a bulb, is it flashing?) if so move onto checking the rear taillight/brake light.

Any problems or questions let me know.

Jarrah