Word forms: (plural) solenoid switches
noun (Automotive engineering: Vehicle components, Lighting and electrical/electronic systems) A solenoid switch is an electrical switch that is often used where a high current circuit, such as a starter motor circuit, is brought into operation by a low current switch. ⇒ When the key switch is turned to Start and the gearshift is in neutral, the circuit between the battery and the solenoid switch is complete. ⇒ The solenoid switch activates a heavy-duty switch that connects the vehicle's battery to the starter motor. ⇒ When the ignition key is in the Start position, a solenoid switch engages the starter's drive pinion.
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