Principles of Operation

Steering Column Switches

Principles of Operation

Ignition Switch

The ignition switch is controlled by the ignition lock cylinder with a key. When the ignition 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 specific components.

Key Removal Inhibit Solenoid

The key removal inhibit solenoid (also known as the key release interlock actuator) is an electronically controlled solenoid that prevents the ignition lock cylinder from being turned to the OFF position unless the selector lever is in the PARK position. The key removal inhibit solenoid is part of the ignition switch.

Multifunction Switch

The multifunction switches control various components electrically. The multifunction switches control a ground signal for the high beam, flash-to-pass and turn signal functions. The multifunction switch also controls a ground signal for the various wiper and washer functions.

For headlamp and turn signal concerns, refer to Lighting and Horns.

For wiper and washer concerns, refer to Wiper and Washer Systems.