Hello everyone

I'm finishing my restoration on my 1967 mustang and the question is if the brake light turns on when the ignition key is turn to ON position or does it light when you have low braking fluid on the brake system?

 

Neither. The light illuminates when there is an imbalance in the system, such as leaking wheel cylinder, etc.

This is the divider block and switch that operates the light:

 

illustrated answer!

tank you 2+2 GT