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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2499 (Steering Column Switches -- F250-F550 Super Duty) >> Diagnosis And Testing >> Steering Column Switches >> Principles of Operation >> Ignition Switch

Ignition Switch

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: The Smart Junction Box (SJB) is also identified as the Generic Electronic Module (GEM).

The ignition switch is controlled by the ignition lock cylinder with a key. When the ignition lock cylinder is turned using the key, a mechanical connection positions the ignition switch to the selected position, and allows the ignition switch to send voltage to the Battery Junction Box (BJB) and the SJB  . The ignition switch also contains a key-in-ignition system that allows the SJB  to detect when the key has been inserted in the ignition switch. This information is used by the SJB  for the brake shift interlock system. For information on the brake shift interlock system, refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS . The available ignition switch positions are:

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