Deactivator Switch
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2003 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
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.