Ok, so this issue still persist. I just received a new tailblazer and it totally freaks out. It stays on all the time when the bike is on. The front brake has no affect on it.
The rear brake however I can use to make the light flicker. I think through my adjustment of rear brake pedal, I've somehow managed to trigger the 'on' signal constantly.
Anyone have any advice on what I could check? I've tried re-adjusting the pedal. Is there any adjustment for the light switch too somewhere?