To find it, you'll need to:
1. Locate the underhood fuse box: This is usually a black plastic box, often near the battery.
2. Open the fuse box: It should have a cover that either lifts off or swings open. You might need a screwdriver or other tool depending on the design.
3. Consult the fuse box diagram: The inside cover of the fuse box should have a diagram showing the location of relays and fuses. Look for a relay labeled as "turn signal," "flasher," or something similar. The diagram will use symbols and numbers to denote the relay position within the box.
If you can't locate it using the diagram, you could try a search online for a "1996 Chevrolet S-10 Blazer fuse box diagram" to find a clearer image. Providing your specific trim level (e.g., 4x4, 2-door, etc.) might help find a more precise diagram.