Testing for Grounded Compressor

Scrap copper suction line of the compressor, so it shines. This can be done with the blade of a knife or a grain of sand fabric. Place one sensor on a clean surface of copper, and the other on the compressor terminal. Check each one by moving the probe for each terminal. If no deviation meter, compressor not grounded. If you have read the compressor is bad, and you never need to examine further. Three terminals are electrically connected internally.