A light switch does not have a fuse, it works safely only up to 10amps. You only need to join if you are in a circuit of more than 10amps, as a main current ring. If you are in an illumination circuit, you do not need a fuse.

Check your owner's manual to see the location of this fuse. It is often found in the power center in the engine compartment, but it can also be in the fuse panel below the dash. If the fuse has jumped, replace it with a new fuse (even the amplifier) and try again.

The first component, and easy to control, is the fuse of the headlights. Depending on how the circuit of the headlights is configured, there may be a fuse or several fuses for the headlights. If an asphyxiated fuse is found, then replacing it can solve the problem. You must find the battery voltage on both sides of the fuse.

Remove the fuse panel cap, which is positioned on the front of the dashboard, near the door.

To find out what's causing your problem, start inspecting the main fuse for the headlight circuit. See your owner's manual for the location of this fuse. It is often located in the engine compartment power center, but it can also be in the fuse panel below the script.