CONsTANT bUTTON To operate the motor in continuous mode: Pressing the Mom/Con button toggles the motor between momentary and constant. When the motor is in constant the propeller will run continuously at the foot pedal speed setting without keeping your foot on the pedal. Even while in constant mode, however, the toe button on the heel/toe pedal is momentary. Prop button will not work with the MODE button engaged. This is the only info from the instruction book. May not be the answer you are looking for. When you push the con button the green light on your foot pedal will light up. If working properly it will indeed go out when pressed again. do not confuse the power up light on the trolling motor with your con light on the foot pedal?