Pinpoint Test D: No Power In Start

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. 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 multi-meter probes.

D1 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch Component Test.
  Refer to COMPONENT TESTING -- F250- F550 for component testing.
- Is the ignition switch OK?
- Yes: GO to D2 .
- No: INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
D2 CHECK CIRCUIT CDC34 (WH/OG) FOR AN OPEN
- Ignition OFF.
- Disconnect: Ignition Switch C250.
- Disconnect: SJB C2280B.
- Disconnect: Run/Start Relay.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJB C2280B-45, circuit CDC34 (WH/OG), harness side.
  
  Fig 1: Measuring Resistance Between Ignition Switch C250-1 And SJB C2280B-45
  Courtesy of FORD MOTOR CO.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG) and run/start relay cavity 85, circuit CDC34 (WH/OG), harness side.
  
  Fig 2: Measuring Resistance Between Ignition Switch C250-1 And Run/Start Relay Cavity 85
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes: GO to D3 .
- No: REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.
D3 CHECK FOR VOLTAGE AT THE RUN/START RELAY
- Measure the voltage between run/start relay cavity 30 and ground.
  
  Fig 3: Measuring Voltage Between Run/Start Relay Cavity 30 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to D4 .
- No: VERIFY BJB fuse 46 (40A) is OK. If OK, INSTALL a new BJB . TEST the system for normal operation.
D4 CHECK CIRCUIT GD113 (BK/YE) FOR AN OPEN
- Measure the resistance between run/start relay cavity 86, circuit GD113 (BK/YE) and ground.
  
  Fig 4: Measuring Resistance Between Run/Start Relay Cavity 86 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to D5 .
- No: REPAIR circuit GD113 (BK/YE). TEST the system for normal operation.
D5 CHECK THE RUN/START RELAY
- Carry out the Mini ISO Relay Component Test.
  Refer to COMPONENT TESTING -- F250- F550 for component testing.
- Is the relay OK?
- Yes: GO to D6 .
- No: INSTALL a new relay. TEST the system for normal operation.
D6 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN
- Disconnect: SJB C2280E (all engines).
- Disconnect: PCM C1332B (diesel with OTIS ).
- Disconnect: PCM C175T (gasoline only).
- For diesel engine vehicles , measure the resistance between ignition switch C250-10, circuit CDC35 (BU/WH), harness side and SJB C1232B-26, circuit CDC35 (BU/WH), harness side.
  
  Fig 5: Measuring Resistance Between Ignition Switch C250-10 And SJB C1232B-26
  Courtesy of FORD MOTOR CO.
- For gasoline engine vehicles , measure the resistance between ignition switch C250-10, circuit CDC35 (BU/WH), harness side and PCM C175T-44, circuit CDC35 (BU/WH), harness side.
  
  Fig 6: Measuring Resistance Between Ignition Switch C250-10 And PCM C175T-44
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to D7 .
- No: REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.
D7 CHECK THE SJB CONNECTOR
- Check SJB C2280B for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: SJB C2280B.
- Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULES . 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.