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dull head lights cab be from several things
1-bad reflectors behind the bulbs --any yellowing, rusting or dull reflector surfaces -- replace head light assemblies
2 badly aligned head lights-- beams shining off into space instead of on the road. --- have an alignment done on the lights
3 wet roads do not reflect head lights properly so it appears that the lights are not working well--- not much to do. the light reflects forward of the wet surface and not back to the driver
4 only one head light or no main beams and running on low beams only--- check light operation and check light control module for operation
the bulbs are pre-set in focus and if fitted correctly in the head light assembly they will be focused and adjusted correctly. Try adjusting the whole head light assembly by the 3 screws / adjusting knobs at the back of the assembly to aim the head lights correctly.
Before anything make sure you H1 bulb is seated correctly on mount (that the dimple on the bulb metal plate is in he hole of the mounting plate. When you remove the spring clamps for the bulb, turn the bulb slightly in both directions until you see it/feel it slide in and re-attach the spring clamps. Check if this resolved you adjustment. If it is still off, you will see a hole on top of the core support above the head lamp where inside you will see an allen head type plastic head with an optional Philips screw insert. That is one of your adjustment screws for vertical. There is one on each side. Behind the head lamp unit (between the low beam and high beam) you will also see a white plastic gear button. This is another adjustment screw for horizontal.
You should have two plastic nuts on each headlamp assembly, one will be for your high beams and one will be for your low beams.
The nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail (might see holes in your rail above the headlamp unit where the screws are hidden)
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)
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.
Yes, you can. Just take off the front grill, and the headlights assembly. Don't tinker with the head- light assembly adjusting nut, as this would change your headlight level. Take headlight bulb off and change it. Replace the headlight, then, the grill, and it's done.
remove wires to bulbs. next you need to remove the headlight bolts probaly around two to four per headlight. next remove headlight next install other one you need to use adjuster screw to fouce head light once installed
on each headlamp assembly, there will be either one or two plastic nuts that you can turn.
If you only have one nut on each, that will adjust the vertical aim of the headlights.
If you have two nuts on each, one will adjust the vertical and the other will adjust the horizontal.
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)
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.