Brake light problems

I had a similar problem with my right brake light not working everytime the cam canceled. Turned out to be a dirty contact in the switch. Pull the wheel and the cancel cam to get to the contacts if it is like mine. The sliding contacts might be dirty and just need cleaned. Be careful not to lose any parts when taking it apart as they are tiny. Easier and cheaper to fix if it is just a dirty contact. Keep in mind the left brake light should always be on when the right signal is turned on. If the light goes out on center turn switch, one end of the contact is dirty or not making contact at all until the right signal is activated.