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This includes the wiring diagrams at the end. Lots of them.
For whatever reason, clicking on that link takes me to Rick's Camaro Parts which is supposedly an Eckler's company but it doesn't have any Corvette stuff.
If you go to the C4 Parts For Sale section, you will occasionally find FSM's for your '87. The FSM is a two-book set and all FSM's are specific to a given model year.
I prefer the book style simply because you can take it anywhere and thumb thru it as necessary. For example the wiring schematics in the '87 FSM will take up a number of pages. There are separate wiring diagrams for each of the systems and a separate section for the connector type and a pic of where the system harnesses are located.
For whatever reason, clicking on that link takes me to Rick's Camaro Parts which is supposedly an Eckler's company but it doesn't have any Corvette stuff.
Wha?!? I tested that link myself when I put it up.
Anyway, google "1987 corvette field service manual CDROM", you'll find it. Ecklers has it on sale (if they aren't hacked, that is).
Something wrong with the CF "link" function. When I type my own request for "ecklerscorvette.com", I get the correct web site, but when I use the CF "link", I get Rick's, too! Has CF been hacked?