Diagnostic Aids

NOTE: After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST procedures to ensure all electronic engine control systems are working properly and DTCs are no longer present.

Perform this test when directed by QUICK TEST. Brake Pressure Applied (BPA) switch is a pressure switch that senses brake pressure and is redundant with Brake On/Off (BOO) switch to provide a back-up to deactivate cruise control.

NOTE: BPA switch equipped on F650-750 with cruise control only.

Fig 1: Identifying Brake Pressure Applied Switch Circuits (Econoline)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Brake Pressure Applied Switch Circuits (Excursion & F250-550)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Brake Pressure Applied Switch Circuits (F650-750 W/Air Brakes)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Brake Pressure Applied Switch Circuits (F650-750 W/Hydraulic Brakes)

Courtesy of FORD MOTOR CO.