thank you for this video/post. my tail light is solid ON at all times (and seems quite bright). tail light does not brighten further from what should be a more dim rear “running light” when the front brake lever is pulled in and also doesn’t get brighter when rear brake lever is depressed. the large stock tail light assembly was removed by prior owner and he didn’t even realize the light didn’t illuminate brighter when either brake was engaged. I will take off the seat and left side cover to look at his wiring. any clues or guidance you may have would be greatly appreciated. thank you!
I’m going to say it’s the front brake sensor that’s broken. It’s pretty easy to break that sensor when changing the lever or disassembling it. Follow the front sensor wire that goes behind the headlight assembly and unplug it. Then turn on bike and actuate the rear break, if tail light gets brighter and dims when you let go, you have found the front brake sensor to be the problem. At this point you can replace the sensor or leave it unplugged, just make sure to use rear brake as well as front in traffic, so the tail light works. If that isn’t the problem, do the same as above with rear brake sensor, on my bike the wire runs next to exhaust that has melted the wires, not to the point where there were shorting but very near. I fixed that by wrapping it in heat shield tape. If yours are melted and causing the short, that could be the problem.
thank you for this video/post. my tail light is solid ON at all times (and seems quite bright). tail light does not brighten further from what should be a more dim rear “running light” when the front brake lever is pulled in and also doesn’t get brighter when rear brake lever is depressed. the large stock tail light assembly was removed by prior owner and he didn’t even realize the light didn’t illuminate brighter when either brake was engaged. I will take off the seat and left side cover to look at his wiring. any clues or guidance you may have would be greatly appreciated. thank you!
I’m going to say it’s the front brake sensor that’s broken. It’s pretty easy to break that sensor when changing the lever or disassembling it. Follow the front sensor wire that goes behind the headlight assembly and unplug it. Then turn on bike and actuate the rear break, if tail light gets brighter and dims when you let go, you have found the front brake sensor to be the problem. At this point you can replace the sensor or leave it unplugged, just make sure to use rear brake as well as front in traffic, so the tail light works.
If that isn’t the problem, do the same as above with rear brake sensor, on my bike the wire runs next to exhaust that has melted the wires, not to the point where there were shorting but very near. I fixed that by wrapping it in heat shield tape. If yours are melted and causing the short, that could be the problem.