Why is one rear fog light on and the other off on the Volkswagen Lavida?
2 Answers
The reason why one rear fog light is on and the other is off is that there is only one rear fog light. The main purpose of having only one rear fog light is to distinguish it from the brake light. According to the EU ECE R38 regulation, if two rear fog lights are installed, they must be positioned more than 10 cm away from the brake light. Front fog light illumination: When driving in adverse weather conditions such as fog, snow, heavy rain, or in smoke-filled environments, front fog lights are essential to illuminate the road ahead and ensure driving safety. In recent years, in terms of styling design, fog lights are often placed on the front bumper. Function of the light shield: The light shield inside the front fog light is designed to block the light emitted by the filament towards the upper part of the reflector, creating a clear cut-off line in the light distribution, i.e., dark above and bright below.
I had a similar issue with my Volkswagen Lavida—one rear fog light was on while the other wasn't, which is quite common. My first thought was a burnt-out bulb—either it reached the end of its lifespan or the filament was damaged by vibration. That time, I opened the trunk and checked the socket: after removing it, sure enough, the bulb was blackened, and replacing it fixed the problem. If the bulb is fine, it might be a fuse issue; the rear fog lights on the Volkswagen Lavida usually have a dedicated fuse, tucked inside the fuse box—you can find its location in the manual. Last time, replacing the fuse cost me just ten yuan, and it was straightforward. Wiring is also crucial—aged wires or loose connectors can disrupt the current. I recommend regular maintenance of the lighting system and not overlooking it when driving at night, as poor visibility can easily lead to accidents. In short, start with the bulb and fuse—most cases can be handled yourself, but if not, visit a repair shop. Safety comes first.
