Pinpoint Test G: Flash Code 2 - STOPLAMP Switch Circuit Failure

• Apply and release the brake pedal while observing the stoplamps.
• Do the stoplamps operate correctly? 

Yes  : GO to  G2.

No  : REFER to EXTERIOR LIGHTING to continue diagnosis of the stoplamps.

• Key in OFF position.
• Disconnect: Speed Control Actuator C122.
• Key in ON position.
• Measure the voltage between the speed control actuator C122-4, circuit 15S-PG17 (GN/BU), harness side and the speed control actuator C122-10, circuit 91-PG12 (BK/WH), harness side while applying the brake pedal.
  Fig 1: Checking Circuit 15S-PG17 (GN/BU)

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

Yes  : INSTALL a new speed control actuator. REFER to SPEED CONTROL ACTUATOR . TEST the system for normal operation.

No  : For vehicles equipped with an automatic transaxle, REPAIR circuit 15S-PG17 (GN/BU). TEST the system for normal operation.

For vehicles equipped with a manual transaxle, GO to  G3.

• Key in OFF position.
• Disconnect: CPP Switch C257.
• Measure the resistance between the CPP switch C257 pin 1, component side and the CPP switch C257 pin 3, component side with the clutch pedal applied and then released.
  Fig 2: Checking CPP Switch For Open

  Courtesy of FORD MOTOR CO.
• Is the resistance less than 5 ohms with the clutch pedal applied and greater than 10,000 ohms with the clutch pedal released? 

Yes  : GO to  G4.

No  : INSTALL a new CPP switch. TEST the system for normal operation.

• Measure the resistance between the speed control actuator C122-4, circuit 15S-PG17 (GN/BU), harness side and the CPP switch C257-1, circuit 15S-PG17 (GN/BU), harness side.
  Fig 3: Checking Circuit 15S-Pg17 (GN/BU) For Open Between Speed Control Actuator And CPP Switch

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

Yes  : REPAIR circuit 15S-PG7 (GN/BU). TEST the system for normal operation.

No  : REPAIR circuit 15S-PG17 (GN/BU). TEST the system for normal operation.