Deactivator Switch

On vehicles with speed control, a deactivator switch (brake pressure switch) is located above or underneath brake master cylinder as an additional safety feature. Normally, when brake pedal is depressed, an electrical signal from brakelight circuit to speed control amplifier will turn off system. Under increased brake pedal efforts, deactivator switch mounted on master cylinder will open and remove power to speed control actuator clutch, releasing throttle, independent of speed control amplifier.