Diagnosing Usual Problems of Volvo S40 Corner Lights
The cornering lamps of the Volvo S40 are not often the parts that we expect to cause problems. In fact, most corner lights function normally throughout the lifespan of the vehicle. But various factors such as age and weather conditions can cause the corner lights to break down. And once they do start to fail, the corner lights must be repaired or replaced as soon as possible. Otherwise, you're likely end up with a ticket or, even worse, in a car accident. In this article, we'll enumerate some of the common problems of Volvo S40 corner lights and how to diagnose them.
The corner light doesn't turn on
The corner lights automatically illuminate alongside with the turn signal lights, but if they fail to activate it's either because the bulb inside the corner light has burned out or if one of its electrical connections has gone bad. First, detach the corner light bulb from its housing and check if it's still in good condition. If the bulb has blackened or the filament inside is broken, the bulb is damaged and needs to be replaced. If the corner light appears fine, the problem might be with a cut or defective wire. However, if external lights in your S40 aside from the corner lights are not turning on, the problem would likely be with a blown fuse.
Water(condensation) inside the corner light housing
In some instances, particularly in humid areas, droplets form and accumulate inside the corner light of the S40. This is due to condensation from by varying temperatures inside and outside the lens. When the outside temperature goes down and, cool outside air enters the housing. If the lens is colder than the air outside the housing, droplets of water will condense on the inside of the lens. Normally these droplets evaporate once the outside temperature rises up, but if the vehicle has been parked in a shady, damp area or in an underground parking lot, the condensation might pool at the bottom of the housing. If there is a significant amount of condensation inside the lens, the corner light has to be disassembled and allow it to dry to prevent the onset of mold. Also, check the openings around the corner light are not clogged with mud, insect eggs and other debris.
If the light emitted by the corner light is fainter than usual, it might not be receiving enough power due to a bad alternator. Test the alternator with a multimeter to see if it is providing sufficient power levels.