Owner's Manual for a 1989 C4 Corvette Coupe
 

Gidday,
I recently purchased a 1989 C4 Corvette Coupe L98 (Tuned Port Injection), (and I love it.)
https://cimg5.ibsrv.net/gimg/www.cor...eb638d0e5a.png

The battery seems to go flat within a week and I believe that I may be using the 'Security/computer' incorrectly, or I have a 'current drain' from another source.
I have purchased two "Service Manuals" that don't describe where to find the 'controls' or how to adjust them.
Is there a website that I can go to, to download the Owners/Operators manual to help me, please?
Or does anyone have a (used) "Service Manual" that they would be prepared to let go cheaply? (I also need help to find how to operate seats/aircon/etc.)
Thanks.