Where is the head light relay on a 1996 S10?

On a 1996 Chevrolet S10, the headlight relay is typically located in the under-hood fuse box. You can find the fuse box on the driver's side near the battery. The relay is usually labeled, so check the diagram on the cover of the fuse box for the specific location of the headlight relay. If you're having trouble, refer to the vehicle's service manual for detailed diagrams and instructions.