Solenoids are electromagnetic switches with a movable core that converts current flow into mechanical movement.

In a "pulling" type solenoid, the magnetic field pulls a core into a coil. These solenoids are called magnetic switches on Toyota starters. A pull-in coil "pulls" the core into the coil, and a hold-in coil "holds" the core in place.

In a "push-pull" type solenoid, a permanent magnet is used for the core. By changing the direction of current flow, the core is "pulled in" or "pushed out." A typical use is on electric door locks.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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