Quote Originally Posted by wannabe fisherman View Post
That's the way to do it, cut off the current GOING OUT. I'd think it's too late if you cut off the return line, negative, side.
Pos/neg doesnt matter on a switch, unless you are using your outboard battery which is grounded to the hull. If its a grounded system, you always switch on the pos. If its a closed system, like dedicated livescope battery, it doesnt matter. You ALWAYS fuse/breaker the positive side.

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