97 ford expedition radio wires?

[pinguin]

i need the radio wires diagram to know all the radio wire color and where they go to or what they are for i want to conect the factory radio and make 2 pioneer 6x8 speakers for the rear work but will i need some factory wire speaker adapters for them to work because i cut the wire that had like a little plug to connect to the factory speaker and lost it and conected the wires to the pioneer and it did nothing can i still make after market speakers work oh and also i installed a aftermarket stereo and took it to this guy that said he knew how to make the stereo work and he cut all the speaker wires and some are not connected could some one please help and let me know how to connect it my self and make it work with the speakers car audio shop charges me 80 bucks and he says he will leave it working but i dont have money right now will apreciate all help