Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Ford RV Cutaway, 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when directed by QUICK TEST. This test is intended to diagnose a faulty BPP switch circuit or PCM. This test is only intended to diagnose the following components and circuits:

Brake Pedal Position (BPP) Wiring Harness Circuit
Powertrain Control Module (PCM)

Brakelight switch or BPP input is wired to brakelight circuit and informs PCM when brake pedal is applied. BPP input is used to disengage speed control or auxiliary powertrain control systems.

Fig 1: Identifying Brake Pedal Position Switch Circuits (Econoline)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Brake Pedal Position Switch Circuits (Excursion, F250-550 & F650-750 W/Hydraulic Brakes)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Brakelight Switch Circuits (F650-750 W/Air Brakes)

Courtesy of FORD MOTOR CO.