Car headlamps commonly known as "headlights" for the night driving lighting plays an important role in the protection of driving vvdi key tool safety at night is an important factor in this article will be a modern Elantra car as an example with the failure phenomenon through the analysis of the headlamp circuit, The fault point, to solve the problem of light does not light, for other similar light troubleshooting to provide maintenance ideas.

Symptom: Beijing modern Elantra car far and near light are not bright, and open the overtaking lights, the distance lights are bright. Want to car diagnostic find the point of failure, we must first of the modern Elantra circuit diagram analysis, then we together to analyze the modern Yue moving headlamp circuit diagram.

In order to make the headlight remote relay relay switch closed, you must make the headlamps far light relay coil terminals constitute the loop, that is, reference power → headlamps far-light relay coil terminal → high beam switch → BCM → large Light switch → take the iron, this line conduction. At the xtool x100 pad same time, found that the above high-light circuit conduction time, low beam and high beam light is also bright.

By looking at the circuit diagram, you can understand that when the light switch to the headlight position, the low beam light; first light switch to the headlight position, and then turn on the high beam switch, the high beam light is not the cause of the failure as follows.

1. Headlight fuse, headlight high-light fuse; 2. Headlight remote relay; 3.BCM; 4. Headlight switch, high beam switch; 5. Line fault; 6. Underground bad; Filament is damaged.

Modern Elantra far, near light is not bright, you can find their common point of failure, a total of lines, common ground, headlamps, headlamps, BCM, etc. These are the most likely to cause far, near The reason why the light does not shine. Of course, we can also be based on the overtaking light circuit without trouble this point, further narrow the scope of the fault. Hyundai Yue move overtaking lights open when the distance lights at the same time bright, according to the overtaking lamp circuit we can see, Figure 5 circuit is no problem, so there may be a fault in Figure 6 circuit. After a multimeter to detect this part of the circuit, found that the headlamp relay control circuit open, after troubleshooting, the light normal, troubleshooting.

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