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 smart junction box (SJB) supplies voltage to the auxiliary climate control illumination through circuit 2086 (RD/LB) when the ignition switch is in the ON position. Ground for the auxiliary climate control illumination is through circuit 1205 (BK).