Why does my brake light come on and off my ford?

Why does my brake light come on and off my ford?

Cos your car is a piece of ****

Vague question. Do you mean it flickers when you hold down the pedal? There's most likely a loose connection somewhere a long the lines. Possibly a bad electrical component. Do some research on where all the wiring harnesses and modules are located.

Usually caused by low brake fluid level in the reservoir. Especially shows up during turns on one direction. Low brake fluid levels in an indication that your brake shoes/pads friction surfaces are worn down.