While you're waiting for someone with a '88 Gulf Stream just like your model, with the same accessories, you might pull a fuse, then search for what is turned off. Make a note and then replace that fuse and pull another one. You could make some guesses, the large amp fuses might be for the larger items or circuits, the small ones for individual small draw items, etc.
You could also put a light bulb in the fuse circuit, then turn on things until the light lights.
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