Ignition Switch

WARNING: This page is about a different car, the 2009 Ford Mustang. 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 SJB. The ignition switch also contains a key-in-ignition system that allows the instrument cluster to detect when the key has been inserted in the ignition switch. This information is used by the instrument cluster for the brake shift interlock system and for the chime warning system. For information on the brake shift interlock system, refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article. For information on the chime warning system, refer to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article.

The available ignition switch positions are:

OFF
ACC
RUN
START