Mystery Solved
I talked with the boatyard mechanic who said the problem was either a failed connection of the ground to the battery, or a missed wire that should have been reconnected to a negative battery terminal. The latter triggered a vague memory of a wire falling behind the batteries when I disconnected at a terminal.
So I pulled out one of the four 6v’s so could move another and see behind the bank. Sure enough, there was a loose wire that restored power to the panel when reconnected.
A silly, frustrating mistake. The consolation is that I learned a lot about the electrical circuits.
Thanks to all for the input.
I talked with the boatyard mechanic who said the problem was either a failed connection of the ground to the battery, or a missed wire that should have been reconnected to a negative battery terminal. The latter triggered a vague memory of a wire falling behind the batteries when I disconnected at a terminal.
So I pulled out one of the four 6v’s so could move another and see behind the bank. Sure enough, there was a loose wire that restored power to the panel when reconnected.
A silly, frustrating mistake. The consolation is that I learned a lot about the electrical circuits.
Thanks to all for the input.