When driving at night, few safety features are more important than your headlights. If they’re dim, you may have reduced visibility, which can keep you from seeing road hazards in time to avoid them. While some reasons for this problem are relatively straightforward, others may require more intensive automotive work. Here’s what you should know.

Why Do You Have Dim Headlights?

1. Foggy Headlights

Since most headlight lenses are vented to reduce air pressure, it’s easy for water and air to get inside. This leads to condensation when the lenses cool after the lights have been turned off.

The moisture buildup can create a foggy layer that limits the brightness. The plastic cover is also prone to yellowing as it ages, further reducing effectiveness.

2. Corroded Ground Wire

While bulbs can fade as their inside filament wears out, the lights can also be dim if the flow of electricity from your vehicle is disrupted. This most often occurs when the ground wire, which provides the connection between the bulb circuits and the vehicle chassis, becomes corroded.

Even a dirty connection could reduce headlight brightness. Cleaning or replacing the ground wire connections could be enough to solve the problem.

3. Failing Alternator

The alternator is to blame if the headlights grow brighter or dimmer based on how much you’re revving the engine. This indicates a serious problem with this component that should be checked right away.

The alternator powers several other vehicle parts, and if it fails entirely, your car will have to draw all its power from the battery. The battery won’t be able to recharge, and eventually, you’ll get stranded due to a lack of electrical power.

For headlights, brakes, and other auto parts, check out F.A.T.S. Parts. Serving Anchorage, AK, since 1984, this locally owned and operated shop has a wide inventory of quality parts at affordable prices. All parts are backed by a 12-month/12,000-mile warranty. To learn more about their selection, visit them online or call (907) 561-4721.