as far as i know the drl are your high beams with a resistor to dim them
how do I adjust headlights
Low Beam: 9006 High Beam: 9005 See sources and related links below for more information on the 2006 Chevrolet Trailblazer bulb/lamp part numbers.
It is possible that both of the fuses are bad for the low beam headlights and the cruise control. A loose ground wire could cause the fuses to blow.
Dimmer switch controls the selection of either Hi-Beam or Low-Beam headlights
High beam headlights reveal objects at a distance of at least 450 feet away. High beam headlights allow the driver to view obstacles in the road much sooner than low beam headlights.
Turn your low beam headlights on and pull the headlight control out towards you
With your low beam headlights on , pull the headlight control towards you
You use low beam headlights when you're in a town or city in any location.
Use your high-beam headlights at night whenever it is legal and safe.
To adjust the headlights on a 2006 Cadillac SRX, first park the vehicle on a level surface about 25 feet from a wall. Turn on the headlights and mark the center of the beam on the wall with tape. Using a screwdriver, adjust the vertical and horizontal alignment screws located at the back of each headlight assembly until the beam is centered and level with the marks. Ensure both headlights are aligned symmetrically for optimal visibility.
On most vehicles, the low beam headlights are the outside pair of lights. This is true when the headlights are side by side. When the two sets of lights are stacked, the low beam headlights are usually on the bottom.
Car headlights have to be able to "dip" so as not to dazzle oncoming traffic, they therefore can switch between a "high" beam and a "dipped" beam and thus have a dual beam.