What is the reason why the right rear fog light does not light up?
2 Answers
The reason is: Some vehicles are designed with only one fog light, and the right side is a reverse light. If it is confirmed to be a dual rear fog light setup, the issue may be a burnt-out bulb or a broken circuit on the other side. Here are some precautions regarding fog light usage: 1. Applicable conditions: Fog lights are suitable for severe weather conditions such as heavy rain, fog, snow, or dust. The visibility range of fog lights is approximately 100 meters. If visibility drops below 100 meters, fog lights must be turned on, and speed should be reduced. 2. Main purpose: The primary function of car fog lights is to make the vehicle visible to those behind it. Rear fog lights are designed in red for warning purposes. Front fog lights are not omnipotent; if visibility is below 30 meters, turning on front fog lights may not be very effective. In such cases, it is necessary to pull over and turn on the hazard warning lights.
I've dealt with many car lighting issues, and the most common problem with the right rear fog light not working is a burnt-out bulb. Here's how to check it yourself: Open the rear light cover, unscrew the right fog light bulb, and check if the filament is broken or blackened. If the bulb is intact, it might be due to a blown fuse—the fuse box is usually located under the driver's seat or in the engine compartment; refer to the manual to find the corresponding position and replace it. Sometimes, loose or corroded wiring connectors can cause the connection to break on bumpy roads. A faulty relay can also lead to one side failing. Don’t forget to test the switch button—press it repeatedly to check for poor contact. For LED lights, module aging can also cause failure. It’s advisable to keep spare bulbs and fuses on hand. If you notice the light isn’t working, fix it immediately—missing a light in foggy conditions is a major safety hazard. Safety first.
