Ignition Switch

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

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. The ignition switch and cylinder are part of the steering column lock module and can be serviced separately. For additional information on the brake shift interlock system, refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - CD4E article or AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - HYBRID article. The available ignition switch positions are:

OFF
ACC
RUN
START