Galvanic Isolater location on 1987 460 express

Usually behind the power panel in the solon. Should be two of them.
 
@CW Duke In mine there is a single isolator right behind the power distribution panel connecting the boat ground to the dock ground. I am wired for 50A so if your boat is twin 30's then you should see two isolators right next to one another. Sometimes they combined the grounds into one isolator so even with twin 30's you could only have one isolator.

But I am guessing there is another issue if your looking for that? GFCI issues?

BTW - Welcome to CSR - http://clubsearay.com/index.php?threads/460-express-cruiser-1985-1989-discussion-area.83064/
 

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