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starter solenoid

Glossary “starter solenoid” Definition:
A magnetic switch, energize by the ignition switch, that shifts the starter-drive pinion gear into the flywheel ring gear, then closes the electric circuit to the starter motor.

starter relay

Glossary “starter relay” Definition:
A magnetic switch, generally operated by the ignition switch, that uses low current to close a circuit to control the flow of very high current to the starter.