Vehicle Power (VPWR)
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Milan, and 2006 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
VPWR is the primary source of PCM power. VPWR is switched through the electronic engine control (EEC) power relay and is controlled by the ignition switch.