Help 85 dash brake light on flickers

[2.8 is great!]

So the dash light is on in my 85 bronco II for BRAKES. It flickers off when I go fast or ? irradicly goes off once in a while big bump on freeway or ?? I jacked up front spun wheel and brake works did same with rear wheels too. I haven't lost any fluid so what do you guys figure ?

 

[Sasquatch_Ryda]

Is the fluid low? That will cause the light to flicker.