Auto pilot - battery connection

[Steve s]

Bought a 2003 393 and can't understand why the auto pilot won't run off either battery ie when I try to run it off one of the batteries an alarm sounds ???

 

[Don S/V ILLusion]

The low voltage alarm? If so, it's probably a bad connection

 

[Ron20324]

Bought a 2003 393 and can't understand why the auto pilot won't run off either battery ie when I try to run it off one of the batteries an alarm sounds ???

Which alarm?