1994 Ford taurus gl

I recently bought a 1994 Ford Taurus and the prvious owner had a gps system installed. When I went to hook up the stock radio that he had in the car, I found that there were only two spots to plug wires into on the radio. This is a problem because only one of the wires in the dash fits. That leaves me with four other wires and no working radio. I would appreciate it if someone could help me out.

If only one of the harnesses fits, and you have no sound, then it's the wrong radio. My ex once told me I have a perfect face for radio.