For some reason your powermaster brake system is not producing enough boost pressure and not turning off the red lamp. You fist should determine if your pump/motor is running so that can determine if you have a electrical or hydraulic problem. If the pump is runnig all the time see if the pump will produde 600psi at the pump outlet (it should). If pump does not run check the switch/motor for problems. Be careful and always deplete the pressure before opening the hydralic components.