1. Consult your owner's manual: This is the best resource. It will have a diagram showing the fuse box layout and what each fuse controls.
2. Locate the underhood fuse block: It's usually a black plastic box located near the battery, often on the fender well or firewall.
3. Look for a fuse labeled "Headlights," "Headlamp," or a similar designation. The amperage rating might also be printed on the fuse. There might be separate fuses for high and low beams.
4. If you can't find a fuse clearly labeled for headlights, check for a relay: Relays are often used to switch the higher current draw of the headlights. These are usually square or rectangular components, and their location will also be in the underhood fuse block.
If you're unsure about working with your vehicle's electrical system, it's best to take it to a qualified mechanic. Incorrectly dealing with fuses or relays can cause further damage.
