The one I just put in has no adjustment either, the directions said install it and then flip the lever to set it. I'm guessing I received a bad switch, I am going to put the old one back in as suggested and see if I get lights and get another one.

2012 Ram 2500 Crew Cab 4x4 5.7 Hemi
2011 Dodge Durango 3.6L
2009 Dodge Caliber 1.8L 5 speed
1970 Super Bee-someday!