My car doesn't have that feature (just checked) and you're right, powering that fuse does backpower the entire aux circuit so I'm thinking I'll just remove the sunroof fuse and run a new wire from the battery to the sunroof side of the fuse socket (so i won't be powering the other aux fuses), and put a new
fuse in line.

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Serenity-86' 300SDL 482,000 miles (on a "14" head!)