Pinpoint Test A: No Power In All Ignition Switch Positions

WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 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.

A1 CHECK THE VOLTAGE TO THE IGNITION SWITCH
- Disconnect: Ignition Switch C250.
- Measure the voltage between ignition switch C250-4, circuit SBP28 (GN/RD or BU/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between Ignition Switch And Ground Connector End View
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to A2.
- No: VERIFY BCM fuse 28 (15A) is OK. If OK, GO to A3. If not OK, REFER to the appropriate System Wiring Diagrams article to identify the possible causes of the short circuit. REPAIR as necessary. TEST the system for normal operation.
A2 CHECK THE ELECTRICAL IGNITION SWITCH CONNECTOR
- Check the electrical connector for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Repair any identified concerns.
- Connect the ignition switch connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
A3 CHECK THE IGNITION SWITCH SUPPLY CIRCUIT FOR AN OPEN
- Disconnect: BCM C2280A.
- Measure the resistance between BCM C2280A-6, circuit SBP28 (GN/RD or BU/RD), harness side and ignition switch C250-4, circuit SBP28 (GN/RD or BU/RD, harness side.
  
  Fig 2: Measuring Resistance Between BCM And Ignition Switch Connector End View
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A4.
- No: REPAIR circuit SBP28 (GN/RD or BU/RD) for an open. TEST the system for normal operation.
A4 CHECK THE BCM SUPPLY CIRCUIT
- Disconnect: BCM C2280G.
- Measure the voltage between C2280G-1, circuit SBF03 (RD), harness side and ground.
  
  Fig 3: Measuring Voltage Between C2280G-1 And Ground Connector End View
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to A5.
- No: VERIFY MEGA fuse (125A) is OK. If OK, REPAIR circuit SBF03 (RD). TEST the system for normal operation. If not OK, REFER to the appropriate System Wiring Diagrams article to identify the possible cause of the short circuit. TEST the system for normal operation.
A5 CHECK THE BCM ELECTRICAL CONNECTORS
- Check the BCM electrical connectors C2280A and C2280G for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Repair any identified concerns.
- Connect the BCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new BCM . REFER to MULTIFUNCTION ELECTRONIC MODULE . TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.