Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The stoplamp switch is supplied voltage through circuit SBP04 (GN/RD) from the smart junction box (SJB). When the brake pedal is applied, the stoplamp switch routes voltage to the SJB through circuit CCB08 (VT/WH).
For the Milan and Zephyr, the voltage is then routed to the stoplamps through circuit CLS17 (YE/GY).