Not Joe Reeves or an electrical buff ,but open reading or infinity reading between the two yellow wires would indicate an open winding which is bad.Ohm reading between the two yellow leads disconnected from the terminal block should be between 450-600 range.<br /><br />Not sure whether you are saying that yellow wires are common to ground or reading infinity.They should read infinity.A reading of 0 ohms or 'no resistance'would indicate a shorted winding,which is also bad.