July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Steering Wheel Control Switch
WARNING: This page is about a different car, the 2003 Lincoln Aviator. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Steering Wheel Control Switch
Courtesy of FORD MOTOR CO.
Measure the resistance between pins 2 and 4 while pressing the buttons below.