Originally Posted by
gauvins
Happened to me twice -- user error or light malfunction, I can't say for sure. What I do know is that on my evening commute, the tail light wasn't working when I arrived home.
Is there a simple method to ascertain the status of the light, while riding?
Go outside at night, turn the light on, sit on the bike next to something to hold onto, and look down to see if something like maybe the cassette gets any red light on it. Or get in line with something and look back to see if something is reflecting the red light. A road sign works for me sometimes. Then try it while riding. A good mirror makes this easy.