I have an automatic charging
relay that separates the starter battery
when under sail to not deplete it, and reconnects the batteries when on shore power
Except that it is not working quite like this. When I manually disconnect the relay there is no voltage on the starter battery
wire that goes into it. As if the starter battery has zero voltage. So to start the engine
I need to manually connect the house and starter batteries. Checking at the starter battery (when the relay is disconnected) I have 13.4v so it does charge from the shore power
. So somewhere between the starter battery and the relay connection breaks, but one way! The starter battery gets charged, but it doesn't give any power back, so to start the engine
I need to connect the house bank. As if it's a one-way connection.
At the end of my wits here, the Chinese puzzle is killing me. Is there a standard wiring
diagram for the starter battery, the house bank, charging
relay, starter battery on/off switch?