Ignition Switch: Description and Operation

DESCRIPTION
The ignition switch is located in the lock cylinder housing which is clamped to the steering column. The ignition switch is concealed beneath the steering column shrouds and is secured to the lock cylinder housing with a single screw. The ignition switch is a rotary type switch operated directly by the ignition key lock cylinder. A plastic lug on the end of the lock cylinder engages a matching slot on the switch contact plate.

OPERATION
When the ignition key is turned to the ACC, ON, or START position, rotation of the contact plate will connect various circuits to battery voltage. In the ACC position, accessories such as the radio chassis and cigar lighter knob and element are energized. In the ON position the circuits required to operate the vehicle are energized. In the START position, the starter solenoid receives voltage, closing the contacts to energize the starter circuit which allows the starter motor to crank the engine.