What is the problem that BYDF6 headlights don't light up in the morning and light up at night in winter?

The headlights suddenly turned off and on. This may be a circuit problem or a ballast failure, which requires specific inspection.

When the headlights don't work, unscrew the unlit bulb and replace it with a new one. If the new light bulb is on, it is the problem of the light bulb; If it doesn't light up, there is something wrong with the ballast. You can also change the unlit light bulb to Liang Cheng's side. If the light bulb is on, there is something wrong with the ballast. If it doesn't light up, it's the light bulb.

In addition, it is necessary to check the harness and interface of the ballast. If the socket is loose or there is something wrong with the wiring, there will be something wrong with the headlights; If the wiring and plug are normal, there is something wrong with the ballast.

In addition, the xenon lamp ballast may have the following fault characteristics:

1. After installing the ballast, the headlights work normally, but the headlight fault alarm light on the instrument panel lights up. This is a very common fault, which may be caused by the mismatch between xenon lamp and ballast. Xenon lamps and ballasts with the same voltage should be selected.

2. After the ballast is installed, the light bulb flashes or often goes out or the left and right lights are not lit at the same time. Most of the reasons for this failure are circuit problems, which may be caused by excessive starting current of ballast. At this time, it is necessary to check whether the working current of the headlight wire is normal.