The continuity through a de-energized relay coil is checked by measuring what?

To check the continuity through a de-energized relay coil, measuring resistance in ohms is the appropriate method. Continuity tests are typically performed using a multimeter set to the ohms scale. When the relay coil is de-energized, no voltage is present, and it's impossible to measure current or power accurately.

The ohm meter applies a small voltage through the coil and measures the resistance to determine if there is a complete path for current to flow should the relay be energized. A reading typically close to the relay's specified resistance indicates good continuity, while an infinite or extremely high resistance reading implies the coil is open and defective.

The other options—volts, amps, and watts—are not suitable for checking continuity in a de-energized coil. Volts measures electrical potential, amps measures current, and watts is a combination of volts and amps indicating power. None of these would provide insight into whether the relay coil itself is functioning properly when it is not energized.