Hello, 

I'm trying to install my aftermarket radio for my 1987 Honda Civic Si.  Since I can't find the factory amplifier for this vehicle, this is what I have for the radio wiring diagram:

Radio Constant 12V+ Wire - White/Blue
Radio Switched Ignition 12V+ Wire - Yellow/Red
Radio Ground Wire - Black

Front Left Speaker Wire (+) - Blue/Green
Front Left Speaker Wire (-) - Gray/Black
Front Right Speaker Wire (+) - Red/Green
Front Right Speaker Wire (-) - Brown/Black

Rear Left Speaker Wire (+) - Blue/Yellow
Rear Left Speaker Wire (-) - Gray/White
Rear Right Speaker Wire (+) - Red/Yellow
Rear Right Speaker Wire (-) - Brown/White

Is there someone who owns a 1987 civic si has the same wiring diagram as I?  If not, could you please share with me the other wires I'm missing?  

Thanks,
Ken