WARNING: This page is about a different car, the 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Audiophile Sound Radio Circuit, W/ SYNC (1 of 2)
Fig 2: Audiophile Sound Radio Circuit, W/ SYNC (2 of 2)
Fig 3: Audiophile Sound Radio Circuit, W/O SYNC (1 of 2)
Fig 4: Audiophile Sound Radio Circuit, W/O SYNC (2 of 2)
Fig 5: Base Radio Circuit, W/ SYNC
Fig 6: Base Radio Circuit, W/O SYNC
Fig 7: Premium Radio Circuit, W/ SYNC (1 of 2)
Fig 8: Premium Radio Circuit, W/ SYNC (2 of 2)
Fig 9: Premium Radio Circuit, W/O SYNC (1 of 2)
Fig 10: Premium Radio Circuit, W/O SYNC (2 of 2)
Fig 11: SYNC Radio Circuit
Fig 12: THX Audio Radio Circuit, W/ SYNC (1 of 2)
Fig 13: THX Audio Radio Circuit, W/ SYNC (2 of 2)
Fig 14: THX Audio Radio Circuit, W/O SYNC (1 of 2)
Fig 15: THX Audio Radio Circuit, W/O SYNC (2 of 2)