If a ground-controlled relay does not activate when the control terminal is grounded, who is correct in troubleshooting?

In troubleshooting a ground-controlled relay that does not activate when the control terminal is grounded, Technician A would be the correct choice if they suggested that the problem could be due to issues within the relay itself or its connections.

Ground-controlled relays rely on a clear ground connection to activate. If the control terminal is successfully grounded and the relay still does not activate, this often indicates a potential failure within the relay mechanism, a broken or corroded connection, or an internal fault in the relay. Technicians diagnosing such an issue should begin by checking for power at the relay's load terminal, the condition of the relay, and the integrity of the ground connection.

This approach aligns with proper diagnostic practices, focusing on verifying the relay's functionality and ensuring that the ground connection is not only made but also solid. Thus, Technician A's focus on troubleshooting the relay itself and examining associated components is critical for resolving the issue effectively.