The Ford Speed Control Deactivation Switch, also known
as a "brake pressure switch," costs about $21. The switch shuts
off the cruise control when the driver firmly steps on the brakes. The
switch is located under the hood of the vehicle and is attached to the
brake master cylinder on one end and wired to the cruise control on the
other. This position places it above flammable reservoirs of brake fluid.
On most of its models, Ford designed the switch to be powered -- or "hot" --
at all times, even when the vehicle is off and the key is removed from
the ignition.
Inside the switch, a thin film barrier separates brake fluid from the
switch's electrical components.
Investigators say fires can break out under certain conditions, such
as when the film cracks and brake fluid from the master cylinder seeps
into the electrical side of the switch. This can cause a fire, even when
the engine had been turned off and, in some cases, idle for days.
The following signs could indicate that you have a problem with your
cruise-control switch: cruise control is not working properly; brake
fluid is leaking around the switch; fuses are blown near the switch;
or the fuse for the speed control cannot be opened. |