OK, you caught me. I lied like a filthy dog in the dirt.
What I was remembering as a fuse panel in front of passenger seat is a "Switched" terminal block, but no fuses.
According to the Vansco I/O schematic under "Chassis" on the ACA Tech
website, pressing the brake pedal should light either or both of #8 & 24 Input LEDs on the front Vansco 2850 (also under the plastic panel in front of passenger seat & below dash), and LED 12 on rear Vansco 2850 (in batt compartment). From there, one of the rear Vansco output wires would carry 12Vdc to the brake lamp sockets.
I had trouble w/one of my rear brake assemblies accumulating water on our 06; have you checked the bulb sockets for corrosion?