How do you determine whether a relay is functioning properly?

Performing a continuity test with a multimeter is indeed the best method to determine if a relay is functioning properly. This process involves using the multimeter to check whether the relay can complete a circuit when it is energized. A properly functioning relay will show continuity between the common and normally open (NO) terminals when voltage is applied to the coil. If there is no continuity or the relay does not activate when energized, it indicates that the relay is faulty.

This method provides a clear, measurable way to validate the operational state of the relay, making it an essential part of troubleshooting electrical systems. Visual inspections can identify obvious physical damage, but they do not confirm the internal functionality of the relay. Replacing a relay without testing it first may lead to unnecessary replacements and costs. Checking ambient temperature might be relevant in some situations, but it is not a definitive test for the relay's operational capability.