Does the Mitsu Lancer of your year model look like th car at the top of the forums screens, just with 4 door like the sedan?
If you have the square version, the C10 or the Proton looking model, then the car is different.
Electrical diagrams can be found at
www.lilevo.com/Mirage/
89 Turbo CSM will cover the 87-91+ C50/C60/C70/C80 models, but if you are RHD JDM style, wiring colors are likley different in many areas where parts were slightly different. Engine wiring was almost identical, but certain things are omitted like emissions, and whether or not your car is carburetted too.
Pic of your engine bay with the shock towers showing, would help.
87 Electrical diagrams for the engine bay, C10 style body, are listed on the site also (if not, I can email them to you).