Further to Emmisionwiz's answer that worked for me - the holes are in the black plastic covering the radiator support, to each side more or less in line with the headlights. They are marked with an "A" and rotation directions for UP and DOWN. The Phillips screwdriver goes into the hole about 45 degrees from vertical and engages the adjusting rack, where the teeth of the Phillips screwdriver are the pinion. If you shine a flashlight down the hole you can see the rack teeth and all becomes clear. But you will need a long Phillips screwdriver and a little bit of luck.
In the owner's manual it says the lights are adjusted correctly at the dealership and if they need adjustment because of a trailer then take the car to a Honda certified mechanic.
I have a 2004 Accord also and the method is the same for that one too.
I just got thru adjusting my wife's Honda Accord's headlights. Take note of which way to turn it by looking at the plastic radiator cover, there is a hole over each headlight with a directional arrow. Remove same radiator cover and you can see adjustment mechanism a little better (look thru hole TOWARDS front fender and you'll see sprocket). Use a #10 opened end wrench (NOT A PHILIPS HEAD, I tried, it's a waster of time.. even a flat head screw driver worked better than a Philips.) and attach to nut on mechanism. A few turns one direction and you'll see a noticeable change in the headlights height. Easy stuff.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
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forums.tdiclub.com > ... > VW MKIV-A4 TDIs (VE and PD)
Jan 23, 2014 - My driver's side lights are working fine - high and low beams. ... But it definitely looks like the big lamp on the driver's side gets brighter when ..... Drivers side headlight is very dim on low beam and goes out when on high beam ...
In the U.S. the type,
adjustments, and illumination factors of all automobile lighting devices
are regulated by the Federal Motor Vehicle Safety Standard 108. The
headlights must function and be adjusted correctly. Your high beams must
disperse their beams straight forward and low beams down and to the
right while safely providing illumination without too much or too little
glare. It is wise to check the headlight adjustment on your Mercedes at
least every year. Doing it yourself will save you time and money. It
will also make driving safer for you and others you may meet on the road
at night. All it takes is time, some basic tools and a little patience.
Other People Are Reading
Remove components if necessary to allow access to the
left/right and up/down adjustment knobs. They are on top of the rear
side of the headlight. The upper knob adjusts the beam to the left and
right. The lower knob controls up/down adjustments.
Park with the passenger side of the car parallel to a solid
fence or wall and about four feet from it. When there is dim light or
darkness, turn on the lights and use your screwdriver to adjust the
up/down knob on the passenger-side headlight until the light beam is
parallel to the ground (you can see the beam of light against the
surface of the wall).
Turn the car so that it faces the wall approximately one car
length away. Adjust the up/down knob on the driver-side headlight until
it is at the same level as the passenger side headlight. Then adjust
both sides until the small groove on top of the beam cutoff is directly
in front of the light.
Reinstall any components that you removed. Close the hood.
Tips & Warnings
This is method is generic for Mercedes models. Some may differ, as there are many models out there.
Okay, This depends on your State laws, because some States require the headlight aiming to be performed at Inspection time.
There are small hex shaped adjustment screws around your headlamps. They require very small sockets of perhaps 1/16 th of an inch and barely fit next to the headlamp housing. At most there will be 1 for up and down and 1 for left and right so two adjustments for each lamp housing.
Unless the housing has 2 separate independently moving compartments for each low and high beam you are stuck with the setup of the low beams. This means you have to adjust the low beams and the high beams are not independently adjustable.
If you find that each lamp is independent, then disconnect the low beam bulbs and adjust the high beams at night or in a garage and put some tape or marks for a level line for a pattern. Then adjust the beams with the drivers side slightly towards the center of the car and the passengers side to the right of the car.
This is similar to how the low beams are set. You can then raise the beams up to be higher on the passengers side for better visibility. Opinions on this vary.
Myself, I set my passenger beam to hit the curb or right lane marker when I drive on a multilane highway. This way the right side of my car is projecting a beam that keeps me centered in my lane by just keeping my passenger light on the lane marker. It works good in fog and around curves.
The State of Texas was one State which checked headlamp alignment with every annual Vehicle Inpection. The idea is to keep from blinding oncoming motorists.
There were some Magazines which evaluated the lighting in new cars as part of their consumer testing. Some of the Oldsmobiles, I believe, were cited for poor visibility and a term called "cutoff" was used to describe the lack of *********** by the headlight beams.
Now the low beams adjust to the same pattern. For some reason I remember having the low beams at 42 inches height and at a distance of 25 feet. These would be the marks you would try for on the garage wall.
You might want to browse about the magazine articles. You can try the new improved bulbs to help too!
Power for the headlights on the Left side (High and low beam.) comes from the same fuse... The ORANGE wire and the ORANGE/BLACK are the same, they connect in the harness. If you only lack the 12v to make the light work connect them at the headlight assembly.
If your low beam also lacks ground the Left low beam ground is shared with the right low beam ground... Run a wire from left low beam DARK BLUE to right low beam DARK BLUE/WHITE.
If its not working now then your cursed, seek a witch doctor.
For Audi A4 the fuse box is located on the left side of dashboard behind a plastic cover (for left hand steering wheel vehicle). On inner face of the plastic cover you will find the fuse diagram. First fuse on first row from left upper corner is Fuse Nr.20 = F20 (15A) - RH headlamp low beam, headlamp adjustment. First fuse on second row from left upper corner is Fuse Nr.21 = F21 (15A) - LH headlamp low beam, headlamp adjustment.
There is an adjustment screw for the headlight located on the headlight housing. You should just have to turn it clockwise (I believe it requires an allen wrench) and that will raise the light beam higher. If you need further assistance let me know. Thanks and enjoy, Lee