Pinpoint Test D: No Power In Start

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. 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 multimeter probes.

D1 CHECK CIRCUITS 1050 (LG/VT) AND 1522 (DG) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Smart Junction Box (SJB) C2280b.
- Key in ACCESSORY position.
- Measure the voltage between:
  - SJB C2280b-32, circuit 1050 (LG/VT), harness side and ground.
  - SJB C2280b-30, circuit 1522 (DG), harness side and ground.
- Are the voltages greater than 10 volts?
Yes: GO to D6.

No: GO to D2.
D2 CHECK CIRCUIT 1522 (DG) FOR AN OPEN
- Key in OFF position.
- Disconnect: Ignition Switch C250.
- Measure the resistance between SJB C2208b-30, circuit 1522 (DG), harness side and ignition switch C250-7, circuit 1522 (DG), harness side.
- Is the resistance less than 5 ohms?
Yes: GO to D3.

No: REPAIR circuit 1522 (DG) for an open. TEST the system for normal operation.
D3 CHECK CIRCUIT 1522 (DG) FOR A SHORT TO GROUND
- Measure the resistance between SJB C2208b-30, circuit 1522 (DG), harness side, and ground.
- Is the resistance greater than 10,000 ohms?
Yes: GO to D4.

No: REPAIR circuit 1522 (DG) for a short to ground. TEST the system for normal operation.
D4 CHECK CIRCUIT 1050 (LG/VT) FOR AN OPEN
- Measure the resistance between ignition switch C250-1, circuit 1050 (LG/VT), harness side, and SJB C2208b-32, circuit 1050 (LG/VT), harness side.
- Are the resistances less than 5 ohms?
Yes: GO to D5.

No: REPAIR circuit 1050 (LG/VT) for an open. TEST the system for normal operation.
D5 CHECK CIRCUIT 1050 (LG/VT) FOR A SHORT TO GROUND
- Measure the resistance between SJB C2208b-32, circuit 1050 (LG/VT), harness side, and ground.
- Are the resistances greater than 10,000 ohms?
Yes: INSTALL a new ignition switch. REFER to IGNITION SWITCH . TEST the system for normal operation.

No: REPAIR circuit 1050 (LG/VT) for a short to ground. TEST the system for normal operation.
D6 CHECK FOR CORRECT SJB OPERATION
- Key in OFF position.
- Disconnect all the SJB connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect all the SJB connectors and make sure they are seated correctly.
- 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 . REPEAT the self-test.

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.