Okay so I got a free aftermarket deck from my buddy since my volume button is completely broken off and won't play sound. In the aftermarket harness I got from Future Shop,(it says its for 86-00 Fords/Lincolns and Mercurys) there is a grey and black harness. I match up the colours to the stereo harness, plug the grey harness into the grey one in the car, but there is no black one to plug into..just a small black one that will not connect to the black aftermarket one. I turn the key and the stereo comes on and works fine but when i go to play music it does not work at all, I noticed that the black aftermarket harness that won't connect to anything controls the speaker signals, but there is no harness inside the car that fits to plug it into..any help? Its driving me nuts not having a working radio

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