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Pinpoint Test B: No Power In Acc

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: 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 
    1. YES  : Go to  B2.
    2. 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 
    • Key in OFF position.
    • Disconnect: SJB C2280a
    • Disconnect: Ignition Switch C250
      • Fig 1: Measuring Resistance Between Ignition Switch C250-6, Circuit CDC33 (VT/GN) & SJB C2280a-3
      GF0032058Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB C2280a-3, circuit CDC33 (VT/GN), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B3.
    2. NO  : VERIFY SJB fuses 43 (10A) and 45 (5A) are OK. If OK, REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
  3. B3 CHECK CIRCUIT CDC33 (VT/GN) FOR A SHORT TO GROUND 
      Fig 2: Measuring Resistance Between Ignition Switch C250-6, Circuit CDC33 (VT/GN) & Ground
      GF0032059Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  B4.
    2. 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? 
    1. YES  : INSTALL a new SJB. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
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