Steering Column Headlight Dimmer

[Gregsenne]

I disassembled my steering column (all the way down), and after putting it back together, there is an issue with my headlight dimmer, I obviously did something wrong.
So here's my question: How does it work? I *think* it uses this metal rod that hugs the side of the column. The metal rod runs down into this white electric piece on the side of the column. But what does it do? How does it work? With the power on and all the column wires attached, I moved that bar every which way and couldn't get the brights to come on.
Also when I completely reassemble the column, the brights dimmer is loose (you can wobble it forward and back) and it does nothing. Turn signals work fine.

Out of all the instructions I found online for disassembling and reassembling the entire column, nobody was clear on how to reassemble the headlight dimmer

Thanks!