A normally open relay contact should measure as open when the coil is de-energized, as it is designed to close only when the coil is powered.
When testing a normally open relay contact with a de-energized coil, it should measure as open. This is because a normally open (NO) relay contact is designed to remain open when there is no power supplied to the coil. Once the coil is energized, it creates a magnetic field that attracts the contact and closes the circuit. Therefore, without energizing the coil, the contact should remain open, indicating connectivity does not exist between the contacts in this state.