Pinpoint Test B: The Speed Control Does Not Disengage When Brakes Are Applied

B1 CHECK BRAKE PEDAL POSITION (BPP) SWITCH 

• Key in OFF position.
• Disconnect: BPP Switch C278.
• Measure the resistance between the BPP switch C278 pin 1 and pin 2, component side, with no brakes applied.
  Fig 1: Checking Brake Pedal Position (BPP) Switch

  Courtesy of FORD MOTOR CO.
• Is the resistance less than 5 ohms? 

Yes 

GO to B2.

No 

ADJUST or INSTALL a new BPP switch. TEST the system for normal operation.

B2 CHECK BRAKE PEDAL POSITION CIRCUIT 15-PG6 (GN/YE) FOR VOLTAGE 

• Key in ON position.
• Measure the voltage between the BPP switch C278 pin 2, circuit 15-PG6 (GN/YE), harness side and ground.
  Fig 2: Checking Brake Pedal Position Circuit 15-PG6 (GN/YE) For Voltage

  Courtesy of FORD MOTOR CO.
• Is the voltage greater than 10 volts? 

Yes 

GO to B3.

No 

If the stoplamps operate, REPAIR circuit 15-PG6 (GN/YE). TEST the system for normal operation If the stoplamps do not operate, REFER to EXTERIOR LIGHTING .

B3 CHECK CIRCUIT 15S-PG16 (GN/YE) FOR OPEN 

• Key in OFF position.
• Disconnect: Speed Control Actuator C122.
• Measure the resistance between the BPP switch C278, pin 1, circuit 15S-PG16 (GN/YE), and the speed control C122 pin 9, circuit 15S-PG16 (GN/YE), harness side.
  Fig 3: Checking Circuit 15S-PG16 (GN/YE) For Open

  Courtesy of FORD MOTOR CO.
• Is the resistance less than 5 ohms? 

Yes 

INSTALL a new speed control actuator. TEST the system for normal operation.

No 

REPAIR circuit 15S-PG16 (GN/YE). TEST the system for normal operation.