Very strange. When coils go “bad” it’s usually because they were energized for too long, heated up, melted the insulation, and shorted out. You would get a reading of nearly zero ohms if that were the case. But you’re not getting any reading at all? The coil could be fine—it’s very high resistance and would take forever to burn up—but one of the windings might have broken off the lugs, which would account for there being no resistance reading.