My new replacement lights need adjustment beam to low

First make sure replacement bulb is installed in correct position ? some can be installed and will aim light beam hi or low ! most lamp replacements need no adjustments after replacing bulb

What is the proper adjustment/
Head light adjusters are part of the head light assembly and yes high and low beam are adjusted as one unit normally. Proper adjustment is done on a machine, at an equipped facility.

bad connection or bad earth check all connection or bulb

When either the high or low beam light is out in either side, DRL (daytime running lights) indicator will come on. When one bulb goes out, that's a clue the opposite bulb will burn out soon, so its best to replace both bulbs. If it was a fuse issue, both left and right side would be out. If driver side is OK but passenger side is not, then its a bulb issue. A 2006 Honda civic takes 9006 (HB4) low beam bulbs and 9005 (HB3) high beam bulbs. Cheapest is online from Walmart site-2-store. After procuring, wear latex, vinyl, or ANY gloves to keep your (corrosive) oil skin from coming in contact with headlight glass bulbs. Your skin oil will chemically react and cause shorter life span on glass bulbs. Instruction don't tell you this, so you handle with your hands, then need to replace bulbs 3 years later instead of 5 years (or more) in the future. With gloves on, pop the hood and look behind each headlight. Turn counter clockwise to unlock headlight bulb holders. Its a quarter to half turn to unlock bulb holder lock. Replace one bulb at a time so you don't confuse high beam from low beam. The wire has a tab you need to lift to pull out & disconnect wire connector. You might need a slim narrow-**** (NOT phillips) screwdriver to lift the tab; or use your house key. Snap the wire connector to the new bulb, then twist into headlight housing to secure bulb holders, then move on to the next bulb to repeat the procedure. Pict below, 9005 high beam is on the left, 9006 low beam is on the right. Handle by grasping the plastic base, not the glass bulbs. The raised potrusion on the bottom center is where the tab locks onto wire connector. Replace all 4 bulbs now, but in the future, its likely the low beam will wear out before the high beam. In the future, replace only the pair, not all 4. The factory installs inferior bulbs that go out sooner, hoping you'll take to dealership and they ******** you with higher parts-n-labor fees. As opposed to Walmart online site-2-store, it would cost you AT LEAST triple in parts & labor from dealership to replace all 4 headlight bulbs :-(

Sounds like the high beams blowed on one and the low beams blowed on the other you just need a new set.

Park your vehicle on level ground with the headlights near a garage door or wall. A good distance is 2-3 feet away from the wall or door. The location must be perfectly level and flat at a distance of 10 to 25 feet away from the door or wall.
Switch on the low headlight beams and mark the horizontal and vertical centerlines of each headlight beams on the wall using masking tape. This will mark the center of each beam with a +. The marking will tell you where exactly the headlight beams should be centered from a distance.

Move the vehicle back about 10 to 25 feet away from the garage door or the wall.

Keep the headlights on the low beam setting.
Use the markings you made on the wall or garage door to, check where the light shines and see if the centerlines still match up with the masking tape marks. If the centerlines of the two beams do not align with the tape marks, you can adjust one or both sides as needed.

Make the necessary adjustments with the lights still on while watching the light beams on the wall and your marks.
Turning the top adjusting screws in a clockwise direction will raise the beam while counterclockwise turn will lower it.

Turning the side adjuster screws will adjust the lights to the left or right.

Continue the adjustments until the center of the light beams are aligned with the tape marks. Then adjust the vertical alignment of both beams slightly below the marks on the wall. This will assure that the lights are tilted slightly downward so they won’t blind approaching motorist.

The will align bot lights, the high and low sine both are connected to the same headlight!!

The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.

replace the headlight bulbs. Usually when the bulbs blow out the low beam blows out first, but the high beams still work. If you want and need both low and high beams to work then replace the headlight bulbs with brand new ones and I garauntee that both low and high beams will work

There are adjusting screws on the headlight mounts, three of them I think. You may need a torx or allen wrench. Shine your low beams at the garage door or something and make the adjustments. Be careful not to let the low beams shine in other drivers' eyes. When you think it is right, park at night where you can walk in front of the car 100 feet or so and see that the low beams are not too high. The driver side light should point straight ahead, the passenger side light somewhat to the right.

turn on your low beams and look at the passenger side. as a general rule the low beam lights are the ones on the far side of the headlight bucket, not on the inside