How do you test a hps ignitor?

To test a high-pressure sodium (HPS) ignitor, first ensure that the power is off to the fixture. Use a multimeter to check for continuity across the ignitor terminals; a reading indicates it is functioning properly. Additionally, you can observe the ignitor during startup; if it fails to ignite the lamp after a few attempts, it may be defective and should be replaced. Always follow safety precautions when working with electrical components.