WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Air Bag System Wiring Diagram (Freestar, Monterey-1 Of 2)
Fig 2: Air Bag System Wiring Diagram (Freestar, Monterey-2 Of 2)