depends on the sony, my older one has audio input but i think you need to use a bus controller to control the item you attach

now my newer one has an aux in and that you can use by just plugging into it

years were 00 and 04 for the head units

- 95 Mystique LS - Zetec/5spd - 99 Contour SeVT Sport - Duratec/5spd Official NE-CEG Contour/Mustang Family