How do you test a asd relay?

To test an ASD (Alternating Current Solid State Relay), first ensure that the power is off and disconnect the relay from the circuit. Use a multimeter set to the resistance mode to check the input terminals; you should see a low resistance when the relay is activated. Next, apply the appropriate control voltage to the input terminals and measure the output terminals for continuity or the expected voltage. If the relay fails to activate or shows no continuity when expected, it may be faulty.