Where is headlight relay on 1990 Mazda Miata?

The headlight relay on a 1990 Mazda Miata is located in the fuse box, which is situated in the engine compartment on the driver's side. To access it, open the hood and look for the rectangular fuse box near the battery. The relay can be identified by its labeling on the cover or in the owner's manual. Make sure to check the connections and replace the relay if you encounter headlight issues.