I know i searched a lot on the how to adjust your headlight cutoff vertically , but does anyone know what the other grooves where there are metal caps covering it? Looking from hood, you can stick a screwdriver there and adjust it a lot closer than the one to adjust the height of cutoff to be higher or lower which requires like a foot long screwdriver. Well I made mistake adjusting that one instead of the correct one, but either way it still adjusted my cutoff up and down.. What did I mess with? This is from an 06-08 headlight.

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One is up and down and the other is left and right adjustment. But they do affect each other especially when you max them out.

Take it behind a Wal-Mart or some place at night and park 50-60ft back facing a wall strait on and the adjustments will become fairly obvious.

 

Subscribed as i am trying to adjust mine as well (06-08)