
The position light is the red light on the far left and right sides of the rear of the vehicle. At night, after turning on the headlights, if you step out of the car and observe, you will see the red lights on the far left and right sides of the rear illuminated—these are the position lights. Below is some related information about position lights: 1. Position lights are somewhat similar to the anti-collision lights installed on the wingtips of aircraft, primarily used during driving in conditions such as dusk, cloudy days, or rainy and foggy weather to indicate the width and height of the vehicle. This helps other vehicles determine their relative positions and sizes when meeting or overtaking. Typically, the color of the position lights is white at the front and red at the rear. 2. Position lights are also referred to as small car lights, and they have other names such as width lights and evening driving lights. Position lights are installed at the highest points at the front and rear of the vehicle.

As a driving instructor who has taught thousands of students, I always emphasize the position of the position lights during night practice: For sedans and SUVs, the position lights are usually embedded on the outer edge of the headlight assembly, forming two slender light strips when turned on. Trucks are more conspicuous, with additional position lights installed on the roof to make the vehicle outline easier to identify. If you pay attention to most family cars, you'll notice a small light strip on each side of the headlights closest to the grille and fenders—that's the position light. The rear position lights are even more noticeable, often integrated with the taillight assembly. When braking, a red border light strip below the high-mounted stop light will illuminate. I remember once teaching a student to drive slowly with position lights on in thick fog, and a driver behind us rolled down his window to thank us, saying the light outline helped him avoid a rear-end collision.

Over the years of driving long distances, I've realized that position lights are like a vehicle's contour business card. My Japanese car has a typical design: a row of rice-sized LED beads along the edge of the headlights that stand out at dusk. Once while chatting with a German car enthusiast, I noticed Mercedes prefers standalone position lights at the hood-fender junction. These are most useful on rainy highways - the red glow outlining vehicles in rearview mirrors makes judging distances during lane changes effortless. A reminder for new drivers: many automatics activate position lights in Drive mode, but manuals require turning to the position light symbol (usually the first detent before ignition).

With twenty years of hands-on experience in repair shops, I could draw the wiring diagram of clearance lights with my eyes closed. In passenger cars with split-type lamp assemblies, the small lamp housing near the fender is almost always the clearance light. However, the most common fault location is actually the rear lamp assembly—especially in hatchbacks, where the clearance light is often integrated into the high-mounted light strip on the tailgate, making the wiring susceptible to damage from repeated tailgate operation. A reminder to car owners: when modifying lights, don’t overlook the differences in clearance light bulb specifications—I’ve repaired cases where using the wrong bulb caused a short circuit. For heavy-duty truck maintenance, extra attention is needed, as the aging waterproof seals on roof-mounted clearance lights are a common source of leaks.


