Pinpoint Test G: Flash Code 3 - DEACTIVATOR Switch Circuit Failure

G1 CHECK THE DEACTIVATOR SWITCH CIRCUITRY
- Key in OFF position.
- Disconnect: Speed Control Servo C122.
- Measure the voltage between the speed control servo C122 pin 9, circuit 307 (BK/YE), harness side and the speed control servo C122 pin 10, circuit 57 (BK), harness side.
  
  Fig 1: Measuring Voltage Between connector Terminals
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new speed control servo. REFER to SPEED CONTROL SERVO in this article. REPEAT the self-test.
- No : GO to G2.
G2 CHECK DEACTIVATOR SWITCH POWER
- Disconnect: Deactivator Switch C1025.
- Measure the voltage between the deactivator switch C1025, circuit 418 (DG/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Deactivator Switch C1025, Circuit 418 (DG/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to G3.
- No : REPAIR the circuit. REPEAT the self-test.
G3 CHECK CIRCUIT 307 (BK/YE) FOR AN OPEN
- Measure the resistance between the speed control servo C122 pin 9, circuit 307 (BK/YE), harness side and the deactivator switch C1025, circuit 307 (BK/YE), harness side.
  
  Fig 3: Measuring Resistance Between Speed Control Servo C122 Pin 9 And Deactivator Switch C1025
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to G4.
- No : REPAIR the circuit. REPEAT the self-test.
G4 CHECK THE DEACTIVATOR SWITCH
- Measure the resistance between the deactivator switch pins (component side).
  
  Fig 4: Measuring Resistance Between Deactivator Switch Pins (Component Side)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new speed control servo. REFER to SPEED CONTROL SERVO in this article. REPEAT the self-test.
- No : INSTALL a new deactivator switch. REFER to SPEED CONTROL DEACTIVATOR SWITCH in this article. REPEAT the self-test.