Principles of Operation

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 the central junction box (CJB) to be distributed to various components and systems.

Multi-function Switch
The multi-function switch controls the various components electrically. The headlamp dimmer/flash to pass switch (part of the multi-function switch) sends voltage to the headlamps. The flash-to-pass switch is a momentary switch used to send voltage only to the high beam headlamps. The headlamp dimmer is used to switch voltages between the low and high beam headlamps while the headlamps are on. The hazard switch (part of the multi-function switch) is on the top of the steering column. When this switch is pressed it allows voltage through the flasher causing the turn signals to flash simultaneously. The turn signal switch lever (part of the multi-function switch) operates the left and right turn signals. When the desired turn signal is pressed, voltage is allowed through the flasher and to the selected turn signal, causing the turn signals to flash. The windshield wiper switch (part of the multi-function switch) uses a ground signal to activate the various wiper modes.