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Pinpoint Test B: No Power In Acc

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. 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.
NOTE: Verify that battery voltage is 10 volts or greater.
  1. B1 CHECK THE IGNITION SWITCH 
    • Carry out the Ignition Switch - Electrical Component Test.
    • Is the ignition switch OK? 
    • Yes:  GO to B2  .
    • No:  INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
  2. B2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: SJB  C2280A.
    • Disconnect: Ignition Switch C250.
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB  C2280A-3, circuit CDC33 (VT/GN), harness side.
      Fig 1: Checking Circuit CDC33 (VT/GN) For Open
      G06394564Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to B3  .
    • No:  VERIFY SJB  fuses 43 (10A) and 45 (5A) are OK. If OK, REPAIR circuit CDC33 (VT/GN). If not OK, REFER to the SYSTEM WIRING DIAGRAMS for Edge or SYSTEM WIRING DIAGRAMS for MKX to identify the possible causes of the circuit short. TEST the system for normal operation.
  3. B3 CHECK CIRCUIT CDC33 (VT/GN) FOR A SHORT TO GROUND 
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
      Fig 2: Measuring Resistance Between Ignition Switch C250-6, Circuit CDC33 (VT/GN), Harness Side And Ground
      G06094659Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to B4  .
    • No:  REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
  4. B4 CHECK FOR CORRECT SJB OPERATION 
    • Check SJB  C2208A for:
      • corrosion.
      • pushed-out pins.
      • spread terminal.
    • Connect: SJB  C2280A.
    • 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  . 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.
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