Your not charging.
I install a underdash volt meter on my cars.
as long as Generator is over 12 and under 14 when at speed Im happy, Usually 12 when headlight are on.
Most times its the voltage reg, giving prblems but test generator first,
The manual tells what wires to do what with, I have to read each time I test.
and yes make sure all connections are good and clean etc.
I bounce back and forth to Florida too.Will head down at end of month for a month. Looking for a house with a garage or should I say a Garage with a house.Rons down now at my Moblie home place,with all the parts.Problem there is theres no place for both of us to park all our toys(cars)
In the Mt Dora ,Leesburg area (lots of lakes)the there are 5 winter Amphicar owners! plus all the full time residents within 50 miles(lots)