2.Check the wiring. The wiring that connects the headlights to the relay and the power source may be loose or damaged, which could also cause the headlights to go out. To check the wiring, you can use a multimeter to test for continuity between the relay and the headlights. If there is no continuity, then the wiring may be damaged and will need to be replaced.
3.Check the headlight switch. The headlight switch is responsible for turning the headlights on and off. If the headlight switch is faulty, it may not be able to send power to the headlights, causing them to go out. To check the headlight switch, you can turn it on and off a few times and see if the headlights work. If they do not, then the headlight switch may be faulty and will need to be replaced.
4.Check the bulbs. The bulbs in the headlights may have simply burned out, which would also cause the headlights to go out. To check the bulbs, you can remove them and inspect them for any damage. If the bulbs are burned out, you will need to replace them.
5.Check the ground connection. The ground connection is a metal connection between the headlights and the chassis of the car. If the ground connection is loose or damaged, it may not be able to provide a proper path for the electrical current, which could also cause the headlights to go out. To check the ground connection, you can tighten it or clean it with a wire brush.
If you have checked all of these things and the headlights still do not work, you may need to take your car to a qualified mechanic for further diagnosis and repair.
