F 550 2WD Super Duty V10-6.8L VIN V (2005)
Brake Switch (Cruise Control): Description and Operation
Brake Pedal Switch (BPS)/Brake Deactivator Switch
BRAKE PEDAL SWITCH (BPS)/BRAKE DEACTIVATOR SWITCH
The BPS, also sometimes called the brake deactivator switch, is for vehicle speed control deactivation. A normally closed switch supplies battery
positive voltage (B+) to the PCM when the brake pedal is NOT applied. When the brake pedal is applied, the normally closed switch opens and power is
removed from the PCM.
On some applications the normally closed BPS, along with the normally open brake pedal position (BPP) switch, are used for a brake rationality test
within the PCM. The PCM misfire monitor profile learn function can be disable if a brake switch failure occurs. If one or both brake pedal inputs to the
PCM did not change states when they were expected to, a diagnostic trouble code P1572 can be set by the PCM strategy.
