If the fuse blows, how do you know the lights all work fine? Sounds like you have a short somewhere. It could be some place where the wires are being pinched (you'll have to trace all the wires, a potential PITA). Or it could be one of the lights has blown and shorted itself out in the process. Doesn't happen very often, but it does happen.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10