Yes, to the rear fog lights, I have done so

See the DIY thread for the details, you need about 100 bucks worth of dealer materials, 2 hours of time, and someone to code it for you (if you don't have the OE trailer hitch)

If you have the OE trailer hitch installed, you don't need coding.

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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