What is an Ignition Switch?

Ignition systems have employed many different methods to start engines since the invention of the internal combustion engine. Man-power was the first method of ignition when a man would crank the engine to create a spark. Another method often used in airplanes was a limited explosive placed inside the ignition chamber to provide the initial spark. Typically, a modern automobile ignites using an ignition switch coupled with an ignition lock cylinder.

Understanding the three principal positions found on an ignition system switch provides information important in diagnosing ignition issues. The first position is the “off” position. The second position powers the electrical auxiliaries in the car. The third position closes the connection between the battery, the coil, and the starter that makes the engine crank.

Tell your mechanic at McLaren Scottsdale in Scottsdale, AZ about the symptoms you are experiencing in each position of the ignition switch for an accurate diagnosis.

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