Solenoids, Relays & Components

What Are Solenoids?

Solenoids are electromechanical devices commonly used in automotive systems. They function as switches that are activated by an electrical current. When the solenoid receives an electrical signal, it generates a magnetic field that moves a plunger or a switch. In the context of a vehicle's starter system, a solenoid plays a crucial role by engaging the starter motor's gear with the engine's flywheel. This action allows the starter motor to crank the engine, initiating the combustion process. Solenoids are essential components in various other automotive systems, including transmission, fuel injection, and more.

What Are Relays Used For?

Relays are electrical switches that use an electromagnet to control the flow of current in an electrical circuit. They are integral to many automotive systems, serving as control units for various components. Relays act as intermediaries between low-current control circuits and high-current load circuits. For instance, in a vehicle's lighting system, a relay can control the high-current flow to headlights, ensuring efficient operation. Relays are used in numerous applications, such as starting systems, fuel pumps, cooling fans, and more, to manage electrical connections and prevent damage to sensitive components.

How Much Do They Cost?

The cost of solenoids and relays can vary depending on factors like the specific application, brand, and quality. Basic solenoids and relays are generally affordable, making them accessible components for various automotive repairs and upgrades. However, more advanced or specialized solenoids and relays designed for specific functions or systems may have higher price points. It's important to consider the quality and reliability of these components, as they play crucial roles in the overall functioning of your vehicle. JEGS offers a range of solenoids and relays to suit different budgets and needs.