No, the outer lights light up (#2 in your diagram) for brakes, and its a dual filament bulb so #2 and #4 are lit up in reduced brightness when the tails are on.

Rear fogs are only activated in Europe or when done so via coding and retrofitting in the US models. We only need one set of brake lights in DOT spec.

__________________
2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards