Welcome to the forum.
Here is the spec sheet for that boat.
The wiring diagram for those early boats was a dealership service department document. The later / current boats include the wiring diagram within the Owner's Manual.
It might be possible to use that old document in the local dealership service department to make a copy of the appropriate pages.
The Owner's Manual for these early boats was MUCH less specific than the later / current boats, w/ generic stuff at a MUCH lower utility than Chapman Piloting, the bible of boating.
The web site search engine is poor, but I looked extensively and could not locate the Owner's Manual for your boat. Again, don't fret, not having that document is not a big loss. Just get a similar model document and compile / create reference materials for your boat.
