[Nelsond]

Same here. Dock side fresh water connection works fine, but will not fill tank.  Press the Autofill switch per owners manual instructions - nothing happening.  Wire/engineering diagrams indicate a valve (somewhere), but can’t find it.  Assumed it would be on tank, but doesn’t appear that way.  Certainly would be a lot easier than filling through deck cap.

Where is this switch located at ?  I have never heard of such a thing but may be a feature on your particular model , or maybe I have never found mine LOL . I just fill my fresh water tank through the fitting on the bow of the boat and then when it is full there is a vent on the side of the boat for the overflow .

The switch is inside a galley cabinet next to sink.  The benefit of this “Autofill” function is not having water sitting in the tank getting stale while your connected to dockside water.  Dockside water connection does not go through the tank, rather directly to faucets, etc.  When your ready to cast off and go out to sea you just press the “Autofill” switch and it fills your tank with fresh water.  Then disconnect the dockside hose, turn on the water pump at distribution panel and your ready to go.  So says the manual - not.  I’ll check the mentioned Jabsco site maybe that will shed some light.