Why Does Only One Reversing Light on a Car Illuminate?

[XavierLee]

The reasons why only one reversing light on a car illuminates are as follows: 1. According to national regulations, one fog light is mandatory, with an optional second one. If only one is installed, it must be located on the left side; 2. The position of a single reversing light is also regulated, with reversing lights generally installed on the right side of the vehicle. Since China adopts left-hand drive, placing the reversing light on the right helps drivers reverse and park on the right side of the road at night; 3. Another explanation is that reversing lights are not solely for illumination but primarily serve as a warning to vehicles or pedestrians behind, indicating that the car is reversing and they should take caution; 4. In areas with streetlights, reversing lights have minimal effect, making one or two lights equally effective. In areas without streetlights, a single reversing light is sufficient to illuminate tall obstacles, while low obstacles remain difficult to see even during the day; 5. Even with just one light illuminated, the rear area is still clearly visible.