Test ceramic capacitors with an insulation tester
How do you test ceramic capacitors with an insulation tester?
If your non polar capacitor is rated as 1000volt then select the range 1000v, connect the test probes to the cap leads (either way) and press the start button. A good one should not show any resistance and a bad one will show resistance value. I suggest that you test on good cap first to be familiar with the reading.
Note: please do not select 1000v and test on a 500 volt cap as it can blow the cap.