How to Spot and Confirm Underlying Volvo 244 Headlight Assembly Problems
Because the Volvo 244 headlight assembly is a critical component in helping you see in the dark or under heavy rain, it's very important to always be alert for slight changes in its beam and brightness. If either or both of your headlights are not working properly, then immediately refer to these four common cases to see what could be causing the component to malfunction.
Case 1: One headlight is not working
Check for a burned-out bulb by removing it from the assembly. If it is working fine, inspect the electrical connections, such as the socket in the assembly as well as the connecting wires found under the hood, for corrosion. While you're still inspecting the headlight assembly, you can take preventive measures by tightening any of its parts that may have loosened over time. However, note that this procedure works for all light bulbs except High Intensity Discharge Xenon, or xenon (HID).
If the headlight has a xenon (HID) light source:
If your Volvo's headlight uses xenon (HID), the bulb itself might be faulty or loose. A bad igniter, ground connection, or wiring harness could also be a possibility. Because the xenon (HID) bulb does not have a filament, its failure could have been caused by a crack or a leak. And because it requires a high-voltage igniter to turn it on and keep it glowing, the light won't work if the igniter fails. Sometimes, both bulb and igniter comprise of one unit, though they can also be replaced separately. But because both components are quite expensive, diagnose the headlight assembly properly and carefully before deciding to replace any of these parts.
Case 2: Both headlights are not working
Go through the connecting wire systems. This is usually as easy as checking the fuse, but it can bare several complicated problems such as malfunctioning dimmer switch, headlight relay, module, or headlight switch. Another possible issue with this symptom may be the wires itself, which may be chewed on by rodents that can get into the engine.
Case 3: Headlight brightness fluctuates during acceleration
When you notice your headlights starting to dim steadily or flicker while you're driving, check the car's battery charge. Usually, the culprit here is a bad alternator, as it causes the battery to slowly lose its charge until it eventually dies.
Case 4: Headlights not illuminating the road properly
First, clean the headlight lenses before checking their aim. Moisture is often the cause of this symptom as they can affect illumination, so drying up and cleaning the lenses are always the first solution.