In the diagram of an SPDT automotive relay, which terminals are the coil terminals?

The correct identification of the coil terminals in an SPDT (Single Pole Double Throw) automotive relay is crucial for understanding how the relay operates within an automotive electrical system. In a typical SPDT relay diagram, the coil is energized by applying voltage to these specific terminals, which function to create a magnetic field. This magnetic field then moves an internal armature that switches the connection between the common terminal and one of the two output terminals (normally open or normally closed).

In this context, identifying the coil terminals as A and E is accurate because these are typically the terminals where the relay coil is connected. When voltage is applied across these terminals, it energizes the coil, allowing the relay to either complete a circuit or disconnect it based on the design of the relay. The mechanism is simple yet effective for controlling larger loads with lower control signals, which is common in automotive applications. Recognizing the proper connections ensures that the relay operates as intended, maintaining functionality and safety in vehicle electrical systems.