I have a 2006 PW lexor- different, but maybe some commonalities.
the GFCI in the "head" is also on same circuit as the sink/ overdoor/ outside/ fridge
I would suggest that you reset this with nothing plugged in.
check the AC breakers ( pass side rear on mine).
you say you have AC on the Neutral..the check is "do you really" how are you testing- I have seen meters shown many volts on circuits when the current was in milliamps- so a spurious reading...esp if there are motors on same power supply
Ensure that your power source ( shore power?) is correctly wired.
mike