Homebuilt ROVs Forum

How can i control a servo with 2 wires and a toggle switch (black,red,white wire colors).

You need all three wires to operate the servo. One wire is the power to the servo normally red in color and always the center conductor. The black is your ground wire and the white or orange wire, depending on the servo is the PWM/PPM signal wire that gives the servo its input signal to operate.