Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The ignition switch RUN circuit provides greater than 10 volts through circuits 1050 (LG/VT) and 1716 (GY/YE) to the smart junction box (SJB) when the key is in the RUN position.