* Under the hood in the fuse box: This is the more likely location. The fuse box is usually located near the battery, often on the driver's side fender. Check the diagram on the inside of the fuse box lid to locate the fuel pump relay. It might be labeled "FUEL PUMP" or something similar, or have a symbol representing a fuel pump.
* Under the dashboard: Less common, but possible, the relay might be located in a secondary fuse box or relay center under the dashboard. Access this usually involves removing a panel below the steering column or glove compartment.
To be sure:
1. Consult your owner's manual: This is the best source of information for your specific truck. The manual will have a fuse box diagram showing the location and function of all relays and fuses.
2. Use a wiring diagram: If you can't find your owner's manual, a wiring diagram specific to your 1993 Chevy S10 (available online or at auto parts stores) will show you the relay's location and circuit.
Important Note: Always disconnect the negative battery cable before working on electrical components to prevent accidental shorts or shocks.
