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

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK THE 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 307 (BK/YE), harness side and the speed control actuator C122 pin 10, circuit 57 (BK), harness side.
  
  Fig 1: Checking Deactivator Switch Circuitry
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes : INSTALL a new speed control actuator. REFER to SPEED CONTROL ACTUATOR . REPEAT the self-test.
2. No : GO to H2.
H2 CHECK DEACTIVATOR SWITCH POWER
- Key in OFF position.
- Disconnect: Deactivator Switch C1025.
- Key in ON position.
- Measure the voltage between the deactivator switch C1025 pin 1, circuit 535 (LB/RD), harness side and ground.
  
  Fig 2: Checking Deactivator Switch Power
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes : GO to H3.
2. No : REPAIR the circuit. REPEAT the self-test.
H3 CHECK CIRCUIT 307 (BK/YE) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the speed control actuator C122 pin 9, circuit 307 (BK/YE), harness side and the deactivator switch C1025 pin 2, circuit 307 (BK/YE), harness side.
  
  Fig 3: Checking Circuit 307 (BK/YE) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : INSTALL a new deactivator switch. REFER to SPEED CONTROL DEACTIVATOR SWITCH . TEST the system for normal operation.
2. No : REPAIR the circuit. TEST the system for normal operation.