Call a Mitsubishi dealer parts counter and they will be happy to give u a photocopy from their manual. Free !
This website has a lot of wiring for many cars including '92 Eclipse. http://www.modifiedlife.com/1992-mitsubishi-eclipse-car-audio-wiring-diagram/
Wiring diagram for 96 Mazda b2300
Try PAINLESSWIRING.COM
try haynes
http://www.modifiedlife.com/stereo-radio-wiring-diagram-1997-volkswagen-jetta/
for a stereo? go to the12volt.com
I would Invest in a Haynes Manual.
go to __the12volt.com __aojedam
http://www.installer.com/cars/chevrolet.html
Electrical wiring on a 96 vulcan 1500
go to the12volt.com and enter your vehicle info
http://www.installdr.com/Harnesses/Mitsubishi-Wiring.pdf