July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
DTC 15 : Auto-cruise Control Switch System: Notes
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Auto-Cruise Control Switch System Circuit Diagram