What is ignition?

ignition switch

Glossary “ignition switch” Definition:
A five-position switch that is the power distribution point for most of the vehicle’s primary electrical systems. The spring loaded START position provides momentary contact and automatically moves to the RUN position when the key is released. The other switch detent positions are ACCESSORIES, LOCK, and OFF.

ignition system

Glossary “ignition system” Definition:
The major components, such as the battery, coil, ignition switch, distributor, high-tension wiring, and spark plugs, that provide the right spark at the right time to ignite the air/fuel mixture.

ignition coil

Glossary “ignition coil” Definition:
A transformer containing a primary and secondary winding that acts to boost the battery voltage of 12 volts to as much as 30,000 volts to fire the spark plugs.