Hi, got my mod 2 tomorrow but I checked my bike today and I saw that the rear brake light doesn't seem to work. Both bulbs illuminate when the bike is on, but when using either brake it doesn't seem to do anything.

Could anyone take a video of their rear brake light? I don't know if the bulbs are supposed to illuminate brighter or if perhaps 1 bulb is supposed to be on as standard and the brake Illuminates both.

 

Does it work with the rear brake?

Bulbs a dual filament. It's very possible to have tail lights and no brake lights.

 

They get brighter when you use the brake. Your brake lights aren't working.

 

Those are double filament bulbs. During braking they get brighter due to additional power supply.

I had a situation when one filament broke, so one of the bulbs worked only in tail light mode (no brake light mode). Had to replace a bulb.

There are two bulbs. If both aren't working in brake light mode then it might be a wiring / connection to bulb problem.