1972 Dash Brake Light

[vics stuff]

If I am correct , I think the dash brake light that is tied to the proportioning valve on the master cylinder , is telling you that there is a difference in pressure between the front and rear brakes and either the system needs to be blead or there is something going on inside the brake cylinder. I had found this to be the issue with my all stock 72 two wheel drive .
The light should not come on at all even when initially starting your engine . Something is going on