proportioning valve??

Now, bleed, starting from the furtherest, and move forward. Never push the pedal to the floor, that will trip the valve. Once half bleed, start over, halfway; guy pushing the pedal can now feel the click, as valve moves. Repeat until air out, if light is on; push pedal-slowly bleed one end of car; click, and light goes out, hold pedal there, tighten bleeder. That wasn't it? same way on other end of car; trying to center the valve, with this.