Pinpoint Test B: No Power In Acc

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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 ACC CIRCUIT FOR AN OPEN
NOTE: To access the SJB connector, the floor console must be removed.
- 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
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to B2 .
- No: REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
B2 CHECK THE ACC CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
  
  Fig 2: Checking Circuit CDC33
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to B3 .
- No: REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
B3 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch - Electrical Component Test.
  Refer to COMPONENT TESTING (Except Hybrid), COMPONENT TESTING (Hybrid) for component testing.
- Is the ignition switch OK?
- Yes: GO to B4 .
- No: INSTALL a new ignition switch. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
B4 CHECK FOR CORRECT SJB OPERATION
- Check SJB C2280A for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- 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 . REFER to REMOVAL AND INSTALLATION . 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. TEST the system for normal operation.