there will be voltage to the stator in this case as the 12 volts is an exciter voltage for the ac generator side of the unit
alternators do not have residual magnetism and so a small voltage is required in the stator field windings before an ac voltage can be generated ( same as an alternator on a car will not generate if the battery is not connected prior to engine starting)
there should be a 12 volts from the stator windings through a voltage regulator as once the windings are excited the voltage to the coil has to be regulated to 12 volts or /and output voltage of the unit has there been any work performed prior to the problem where the wires to the switch may have been attached wrongly
best now you talk with a gen repair shop and get more information or a schematic diagram for your set there will be voltage to the stator in this case as the 12 volts is an exciter voltage for the ac generator side of the unit alternators do not have residual magnetism and so a small voltage is required in the stator field windings before an ac voltage can be generated ( same as an alternator on a car will not generate if the battery is not connected prior to engine starting) there should be a 12 volts from the stator windings through a voltage regulator as once the windings are excited the voltage to the coil has to be regulated to 12 volts or /and output voltage of the unit has there been any work performed prior to the problem where the wires to the switch may have been attached wrongly best now you talk with a gen repair shop and get more information or a schematic diagram for your set

Thanks for the help! Thanks for the help!