Pinpoint Test C: No Power In Run

WARNING: This page is about a different car, the 2013 Ford Mustang. 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 THE IGNITION SWITCH
- Carry out the IGNITION SWITCH . Refer to appropriate OEM WIRING COMPONENT TESTING for component testing .
- Is the ignition switch OK?
- Yes : GO to C2.
- No : INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
C2 CHECK THE RUN CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280A.
- Disconnect: SJB C2280E.
- Disconnect: PCM Diode.
- Disconnect: BJB Fuse 39 (5A).
- Disconnect: BJB Fuse 45 (5A).
- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and SJB C2280B-45, circuit CE612 (GY/VT), harness side.
  
  Fig 1: Measuring Resistance Between Ignition Switch C250-1, Circuit CE612 (GY/VT) And SJB C2280B-45
  Courtesy of FORD MOTOR CO.
- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and SJB C2280E-1, circuit CE612 (GY/VT), harness side.
  
  Fig 2: Measuring Resistance Between Ignition Switch C250-1, Circuit CE612 (GY/VT) And SJB C2280E-1
  Courtesy of FORD MOTOR CO.
- Measure the resistance between ignition switch C250-7, circuit CE612 (GY/VT), harness side and:
  - BJB PCM diode, circuit CE612 (GY/VT), input side.
  - BJB fuse 39, circuit CE612 (GY/VT), input side.
  - BJB fuse 45, circuit CE612 (GY/VT), input side.
    
    Fig 3: Checking Run Circuit For Open
    Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to C3.
- No : REPAIR circuit CE612 (GY/VT). TEST the system for normal operation.
C3 CHECK THE RUN CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and ground.
  
  Fig 4: Measuring Resistance Between Ignition Switch C250-1, Circuit CE612 (GY/VT) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes : GO to C4.
- No : REPAIR circuit CE612 (GY/VT). TEST the system for normal operation.
C4 CHECK FOR CORRECT SJB OPERATION
- Check SJB C2280A and C2280E for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: Ignition Switch C250.
- Connect: PCM Diode.
- Connect: BJB Fuse 39 (5A).
- Connect: BJB Fuse 45 (5A).
- Connect: SJB C2280A.
- Connect: SJB C2280E.
- Make sure the connector seats 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 . REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.