Normal Operation
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The stoplamp switch receives voltage from the central junction box (CJB) fuse 18 (20A) through circuit 10 (LG/RD). When the brake pedal is applied, voltage is routed to the stoplamps through circuit 511 (LG)