Pinpoint Test C: Flash Code 3 - DEACTIVATOR Switch Or Circuit Failure

C1 CHECK THE DEACTIVATOR SWITCH CIRCUITRY
- Key in OFF position.
- Disconnect: Speed Control Actuator C122.
- Measure the voltage between the speed control actuator C122-9, circuit 248 (TN/OG), harness side and the speed control actuator C122-10, circuit 57 (BK), harness side.
  
  Fig 1: Checking 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 in this article. TEST the system for normal operation.

No : GO to C2.
C2 CHECK THE VOLTAGE DROP ON CIRCUIT 248 (TN/OG)
- Key in OFF position.
- Connect: Speed Control Actuator C122.
- Key in ON position.
- Measure the voltage drop on the speed control actuator C122-9, circuit 248 (TN/OG).
- Is the voltage drop less than 0.3 volts?
Yes : GO to C2.

No : REPAIR the circuit. REPEAT the self-test.
C3 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN
- Disconnect: Deactivator Switch C277.
- Measure the voltage between the deactivator switch C277-2, circuit 10 (LG/RD), harness side and ground.
  
  Fig 2: Checking Circuit 10 (LG/RD) For Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to C4.

No : VERIFY the smart junction box (SJB) fuse 17 (15A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
C4 CHECK CIRCUIT 248 (TN/OG) FOR AN OPEN
- Measure the resistance between the speed control actuator C122-9, circuit 248 (TN/OG), harness side and the deactivator switch C277-1, circuit 248 (TN/OG), harness side.
  
  Fig 3: Checking Circuit 248 (TN/OG) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new deactivator switch. REFER to SPEED CONTROL DEACTIVATOR SWITCH in this article. TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.