Originally Posted by Tred
How exactly does the sensor work?
If you're asking me, I'm not really sure.
The sensor on the emergency brake lever is just a simple contact like the clutch start cancel switch.
On the brake fluid reservoir there is a connector, but how the sensor works and what it measured, I don't know, maybe someone else does.
I would probably try and take the reservoir off, shake it, see if I could figure out how the sensor worked and fix it.