i bought a stock cassette player out of a 90 4runner. i'm putting it in my 87 pickup with a aftermarket radio in it. so the connections are different. i need to know what color wires are for what. colors are

mint green---blue---pick---purple---light brown---black w/red stripe---gray---pink w/blue stripe--blue w/yellow---green.

those are the colors. whats the power? constant? speakers?

 

Black - Ground
Yellow - Constant Power
Red - Ignition Power
White - Left front speaker
Grey - Left Front speaker
Green - Left Rear Speaker
Purple - Right Rear Speaker

 

there are no yellow, red or white. what ones are the speaker grounds?