A relay is a common electrical element used to control the switch or operation of a circuit. Here are some ways to tell if the relay is broken:
1. Observe the indicator: If the relay has an indicator, the indicator should be on when the relay is working. If the indicator light is not on, it may be relay damage or power failure.
2. Check the electrical connection: check whether the relay wiring is correct and whether there is loose or corroded. If the connection is bad, the relay will not work properly.
3. Measure the resistance: use the multimeter and other tools to measure the resistance value of the relay. Normally, the normal relay resistance value should be between dozens of ohms to thousands of ohms. If the resistance value is zero or infinite, the relay may be damaged.
4. Test the switch action of relay: use multi-purpose tester and other tools to test the switch action of relay. Connect the tester to the control and power terminals of the relay and see whether the switch action of the relay is normal. If there is no switch action, the relay may be damaged. If none of the above methods can determine whether the relay is damaged, it is recommended to replace the relay with a new test.
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