Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [headlight]

Questions about headlights, including main and dipped beams, dim-dip systems, etc

326 questions
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Do matching (left/right) lights often burn out within a short time period of each other? If so, why?

A couple of weeks ago, the right headlight in my car burnt out, so I went to the garage and had it fixed. When I picked up my car, their salesnerd told me to watch my left headlight, for "once one headlight burns out, the other often follows in…
Alexander Klauer
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Car won't start, horn won't honk, headlights won't come on, what could cause this?

Vehicle: 2005 Honda Accord LX 2.4L FI DOHC 4cyl Symptoms Car wouldn't start today. In the past had occasionally had it hiccup before starting but that was the only indicator of problems. No accidents or special maintenance done recently that seems…
user1547672
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What is this extra light on my headlights?

I own a 2006 Mazda 6 Luxury Sport in Australia, and the front headlights have 4 lights on them: It also has a fog light, which is not featured in this photo (but will be visible in later photos). I cannot work out what one of the lights does…
Tas
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How to upgrade a motorcycle battery to a bigger AH battery?

My motorcycle (honda CBF150) came with a 12V 3AH battery. I want to change the stock 35w headlight to a higher power one and connect them directly to the battery (the stock ones are not, and they fluctuate). I also want to add fog lights and usb…
lalli
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Why do LED running lights turn off while the turn signal is blinking?

I've noticed in several new vehicles the following scenario: Vehicle is traveling with LED day-time running lights around/adjacent to the headlights Vehicle activates turn signal indicator Vehicle shuts off LED running light while turn signal…
Trevor D
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Motorcycle Headlight Conversion

I've decided to install a new headlight on my bike. The current setup is two bulbs, one is on for low beam and both on for high beam, with two wires going out of each (h11?). Here is a short video of someone taking apart theirs (I have the same…
Bass
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Why are H4 LED headlights not designed correctly?

In traditional halogen H4 bulbs the low beam filament (the one with the reflector/shield) point in a 180 degree field and the high beam has no shield and has a full 360 degree coverage. This is how all H4 light assemblies are designed to use. Why…
Tanenthor
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How can I secure the power block for my LED headlights?

I purchased an LED low-beam conversion kit and installed it yesterday in my 2010 Forester. The installation was easy enough, other than having to move the battery to get enough space to fit my headlight. However, I am not sure whether I've done…
Joe
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Realistically, how much can I expect to improve cloudy headlights by polishing?

The headlight lenses on my vehicle (a 2001 Ford F-150) are cloudy, and presumably as a result, the headlights are not terribly effective. (I could post a photo if you want.) I bought a polishing kit (Mother NuLens) and used it as directed. The…
Nate Eldredge
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Fixing headlight that keeps blowing fuses

My problem The 10 amp fuse for the right headlight on my 2001 Ford Escort keeps blowing so I presume I have a short to ground somewhere between the fuse block and headlight. What I have tried I purchased this cheap short finder off Amazon: SG Tool…
Web_Designer
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Sealing / effectively preserving restored headlights

There are many methods for polishing and restoring clouded, discolored headlights. My question is: once headlights have been polished and appear quite clear what sort of treatment effectively preserves their clarity? There are numerous headlight…
ebpa
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What is the difference between H7 and H7U bulbs?

Scenario I'm changing my left headlight bulb and it says it is a H7U one. What does the U marks? Possible solutions I searched a bit and found two possible solutions: Marks the shape of the bulb. The bulb is not ultra violet sensitive, therefore it…
totymedli
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No low beams but do have high beams

I have a 2008 Toyota tundra that I replaced 1 headlight on thinking it was bad but then replaced it a second time and it worked fine for 1 day and the all of a sudden now I do not have any low beams on either side. I have high beams. I was told that…
nanar
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Why would headlights stop working after turning over

I have a 2006 Pontiac G6. When I walk up to the vehicle and unlock it, the headlights turn on. After I get into the vehicle and turn it over, I cannot turn the headlights back on. Fog beams and turn signals work fine, but I can't turn the low beams…
Raven
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Is it a cause for concern if one headlight beam points lower than the other

I've always felt that my 2014 Lexus IS350 F-Sport does a poor job of illuminating the road ahead but ignored it assuming that it was more due to the car's low ride height than anything else. However, in a parking lot today I had the opportunity to…
Zaid
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