Grew up driving pre-1980's cars and didn't know about this until this year. The light on the dash that lit up was the same indicator as the light that comes on

Grew up driving pre-1980's cars and didn't know about this until this year. The light on the dash that lit up was the same indicator as the light that comes on when the hand-brake is engaged. When the light would not go off when the hand-brake was disengaged and I thought the brake needed adjustment. Nope, fluid just low.