Got my factory order 3500 CC SRW Big Horn 6.4 4x4 4.10 in February. I like it a lot, but when I tried reading the printed manual at night, I found the interior lights to be way too dim. The manual says there should be a wheel to adjust brightness, next to the one for adjusting instrument brightness, but my truck has only the latter. Do all recent Big Horns lack the adjustment for interior lights, or am I the victim of some temporary parts shortage? Is the brightness control something that only comes as part of some package? How about a hack to adjust the brightness with or without a visible control?