What is this toggle switch for?

John41

I have a 2004 Rinker 342. My boat is on land right now for the winter. When I hooked up power I was getting a reverse polarity light on my circuit breaker panel. In order to get that light off I had to put that toggle switch in the center. Does anyone know what that switch is for?

Ian

Selects which power input is going to be shown on the meter. If the A/C line was unplugged - no volts. If it was plugged in and didn’t show reverse polarity and green then the main input line has an issue.

John41

Thank you. I believe it was set on main when I got the reverse polarity light. Now that the toggle switch is in the middle I don’t get any reading on the meter but I do have power to outlets and battery charger. I don’t know why I’m getting that reverse polarity light.