Frequently Asked Questions Ask APW
If one headlight bulb has burned out, is it necessary to change the other one too even if it is still in good condition?
Answer: No, it is not necessary to change both headlights at the same time. However, it is more practical to buy and change them in pairs. Both headlights are used at just about the same frequency and intensity. So if one has already died out, there is a high probability that the other one is about to reach its demise as well. It would be wise to have a spare in hand when that happens. Also, there may be an imbalance between the brightness of the two headlights. Since one is older than the other, it may appear dimmer compared to the new one.
What are the advantages and disadvantages of halogen and xenon headlight bulbs over each other?
Answer: A halogen bulb has a thin filament inside, which is capable of giving off a bright white light. Because of the halogen gas inside the bulb, the filament is expected to last longer than traditional headlight bulbs. However, road vibrations can break the filament inside a halogen bulb. This drawback makes the xenon bulbs more durable. Xenon bulbs don't have any filament that could break. Instead, they use two electrodes and form an electric arc to generate lighting similar to natural daylight. Xenon bulbs produce three times more illumination than halogen bulbs, too. That's why many Toyota Avalon owners have upgraded their headlights into xenon despite the higher cost.
What can possibly go wrong with a Toyota Avalon headlight?
Answer: Three things must be initially checked to know what is wrong with a Toyota Avalon headlight: wiring, fuse, and charging system. These components are commonly where the headlight problems root from, and the problem can be as simple as a short circuit or a disconnected ground. To know for sure, voltage from the wiring must be gauged. The headlight problem could also be caused by a bad fuse, a dead cell in the battery of the charging system, or a defective alternator. So usually headlight troubles are results of some electrical issues in a Toyota Avalon.