Pinpoint Test C: No Power In Run

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

NOTE: Verify that battery voltage is greater than 10 volts.

C1 CHECK FOR VOLTAGE ON THE IGNITION RUN CIRCUIT
- Ignition OFF.
- Disconnect: SJB Fuse 42 (10A) (if equipped).
- Ignition ON.
- Measure the voltage between SJB fuse 42 (10A), circuit CDC34 (WH/OG), input side and ground.
  
  Fig 1: Measuring Voltage Between SJB FUSE 42 (10A) & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to C2.
No: GO to C4.

C2 CHECK FOR VOLTAGE AT THE SJB
- Ignition OFF.
- Disconnect: SJBC2280B.
- Ignition ON.
- Measure the voltage between SJBC2280B-45, circuit CDC34 (WH/OG), harness side and ground.
  
  Fig 2: Measuring Voltage Between SJBC2280B-45 & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to C3.
No: GO to C5.

C3 CHECK THE SJB IGNITION SWITCH INPUT CIRCUIT FOR VOLTAGE
- Ignition OFF.
- Disconnect: SJBC2280E.
- Ignition ON.
- Measure the voltage between SJBC2280E-1, circuit CDC34 (WH/OG), harness side and ground.
  
  Fig 3: Measuring Voltage Between SJBC2280E-1 & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?

Yes: GO to C10.
No: GO to C6.

C4 CHECK THE SJB IGNITION SWITCH INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: SJBC2280A.
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJBC2280A-4, circuit CDC34 (WH/OG), harness side.
  
  Fig 4: Checking Circuit CDC34
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: GO to C7.
No: REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C5 CHECK THE IGNITION RUN CIRCUIT FOR AN OPEN
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJBC2280B-45, circuit CDC34 (WH/OG), harness side.
  
  Fig 5: Checking Circuit CDC34
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: GO to C9.
No: REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C6 CHECK THE IGNITION SWITCH OUTPUT CIRCUIT FOR AN OPEN
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJBC2280E-1, circuit CDC34 (WH/OG), harness side.
  
  Fig 6: Checking Circuit CDC34
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: GO to C9.
No: REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C7 CHECK THE IGNITION RUN CIRCUIT FOR A SHORT TO GROUND
- Disconnect: SJBC2280B.
- Disconnect: SJBC2280E.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and ground.
  
  Fig 7: Checking Circuit CDC34
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?

Yes: GO to C8.
No: REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C8 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch component test. See within PINPOINT TEST I: THE IGNITION KEY CAN BE TURNED TO THE OFF POSITION WHEN THE SELECTOR LEVER IS NOT IN PARK
  Refer to COMPONENT TESTING (Except Hybrid) and/or COMPONENT TESTING (Hybrid) for component testing.
- Did the ignition switch pass the component test?

Yes: GO to C10.
No: INSTALL a new ignition switch. REFER to Removal and Installation . TEST the system for normal operation.

C9 CHECK FOR CORRECT IGNITION SWITCH OPERATION
- Carry out the Ignition Switch component test. See within PINPOINT TEST I: THE IGNITION KEY CAN BE TURNED TO THE OFF POSITION WHEN THE SELECTOR LEVER IS NOT IN PARK
  Refer to COMPONENT TESTING (Except Hybrid) and/or COMPONENT TESTING (Hybrid) for component testing.
- Did the ignition switch pass the component test?

Yes: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
No: INSTALL a new ignition switch. REFER to Removal and Installation . TEST the system for normal operation.

C10 CHECK FOR CORRECT SJBOPERATION
- Disconnect: All SJB connectors.
- Check the SJB connectors for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: All SJBconnectors and make sure the connectors are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes: INSTALL a new SJB . REFER to INSTALLATION . TEST the system for normal operation.
No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.