Pinpoint Test H: Flash Code 3-Speed Control DEACTIVATOR Switch Circuit Failure

H1 CHECK THE SPEED CONTROL DEACTIVATOR SWITCH CIRCUITRY
- Key in OFF position.
- Disconnect: Speed Control Actuator C122.
- Key in ON position.
- Measure the voltage between the speed control actuator C122 pin 9, circuit 15S-PG16 (GN/YE), harness side and the speed control actuator C122 pin 10, circuit 91-PG12 (BK/WH), harness side.
  
  Fig 1: Checking Speed Control Deactivator Switch Circuitry
  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 : GO to H2.
H2 CHECK THE SPEED CONTROL DEACTIVATOR SWITCH POWER
- Key in OFF position.
- Disconnect: Speed Control Deactivator Switch C278.
- Key in ON position.
- Measure the voltage between the speed control deactivator switch C278 pin 2, circuit 15-PG6 (GN/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Speed Control Deactivator Switch C278 Pin 2, Circuit 15-PG6 (GN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to H3.
- No : REPAIR the circuit. TEST the system for normal operation.
H3 CHECK CIRCUIT 15S-PG16 (GN/YE) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the speed control actuator C122 pin 9, circuit 15S-PG16 (GN/YE), harness side and the speed control deactivator switch C278 pin 1, circuit 15S-PG16 (GN/YE), harness side.
  
  Fig 3: Checking Circuit 15S-PG16 (GN/YE) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new speed control deactivator switch. REFER to SPEED CONTROL DEACTIVATOR SWITCH . TEST the system for normal operation.
- No : REPAIR the circuit. TEST the system for normal operation.