I have a 02 corolla and my drivers side headlight won't light correctly, its like its only half illuminating and not the same as the other side...? offside headlight lights fine, all side lights and full beams work just not the head light. I swapped the bulbs same result. I brought brand new better bulbs same result, I'm not gifted when it comes to knowledge on cars so any help would be appreciated. Oh forgot to mention mot due aswell so extra stress!
Check for a good ground wire and clean ground point for the head light
SOURCE: Headlights
I READ ONLINE THAT THERE WAS A RECALL ON THIS YEAR AND MAKE, CHECK WITH TOYOTA WEB SITES TO RECTIFY YOUR PROBLEM
SOURCE: head / fog light adjustment
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.
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.
SOURCE: low beams dont work, only high beams do. 02 tacoma
If there is power there, then it has to be the bulbs. The trouble that most people have is, they don't see how both bulbs could burn out at once... and they're right. They don't. But you see vehicles with one headlight all the time. They don't know it unless you tell them or they happen to see it themselves. Then the second light burns out, and they think it's a major catastrophe, when in fact, it's just bulbs. The high beam still works because the bulb is double filament. The only other thing it can be is the dimmer switch, and since you switched it to high, it appears to be working. However, if it's not bulbs, it still could be the switch.
SOURCE: Toyota Sienna 2004 Headlight Problem
If you have the HID bulbs, and there is moisture in the bottom of the assembly, the high voltage box at the bottom will not work. this requires removing the whole headlamp, removing the circuit board from the bottom and drying out. I have done mine twice before finally finding how water was getting in at the top seam of the lamp assembly. You will have to dis-assemble part of the wheel well and bumper cover to gain access to all the mounting bolts. Best of luck
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