Pinpoint Test B: No Power In Acc

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.

B1 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 B2 .
- No: INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.
B2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280A.
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-5, circuit CDC33 (VT/GN), harness side and SJB C2280A-3, circuit CDC33 (VT/GN), harness side.
  
  Fig 1: Measuring Resistance Between Ignition Switch C250-5 And SJB C2280A-3
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to B3 .
- No: REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
B3 CHECK THE SJB CONNECTORS
- Check SJB C2208A for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: SJB C2208A.
- 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.