There dim because the Plastic lens is faded or yellowed. You can clean the headlight. -------------------------- A place called partstrain.com might have them. I have bought a couple things from them and they are pretty good. Maybe they have yours. VBd If the headlight lenses are yellowed or fogged over I know how to fix that. Get a product called Crystalenz. I used this stuff on a Dodge Caravan and it cleaned them up like brand new. It was really easy and only took 15 minutes on each light. Check out www.crystalenz.com
Usually dim headlights are caused by a poor ground connection.
the courteous time to dim your headlights is as soon as you see another vehicle, or within one half mile.
when there are oncoming cars, it is appropriate to dim your headlights when they are about 300ft away. Check your diver manual for the most correct answer.
Your headlights may not dim because you don't have dimmer lights. Dimmer lights can blow and leave you with just the high beams.
You should dim your headlights within 500 feet of the car in front of you. The rule of thumb is, if you can see another car, dim your lights.
If you can see the area lit by their headlights, then you are probably close enough to dim your own.
This is an illegal modification.
If by "dim headlights" you mean low-beams... the bulbs are bad and must be replaced.
The headlights on the 2002 Toyota Tacoma might work on dim but not on high beam because of a blown fuse. If the headlights are too dim to see properly in the dark, there could also be a problem with the alternator and the charging system in the vehicle.
100 feet
never
you might have a short in your alternator. In my car the headlights would dim when I put on the brakes or tried to use cigerette lighter to power up my phone.