Pinpoint Test B: No Power In Acc

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. 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 CIRCUIT CDC33 (VT/GN) FOR VOLTAGE
- Key in OFF position.
- Disconnect: SJB C2280b
- Key in ACCESSORY position.
- Measure the voltage between SJB C2280b-4, circuit CDC33 (VT/GN), harness side and ground.
- Is the voltage greater than 10 volts?
1. YES : Go to B3.
2. NO : Go to B2.
B2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Ignition Switch C250
- Measure the resistance between:
  - ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB C2280b-4, circuit CDC33 (VT/GN), harness side.
  - ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
- Are the resistances less than 5 ohms between the components and greater than 10,000 ohms to ground?
1. YES : Go to B4.
2. NO : REPAIR the circuit. TEST the system for normal operation.
B3 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch Component Test. Refer to Ignition Switch - Mechanical .
- Is the ignition switch OK?
1. YES : Go to B4.
2. NO : INSTALL a new ignition switch. REFER to Ignition Switch . CLEAR the DTCs. REPEAT the self-test.
B4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
2. 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.