Where is the fuel pump relay located in my 2004 ford explorer sport trac?

The fuel pump relay in Your 2004 Ford Explorer is found in the engine bay on the drivers side of the vehicle. Look next to the firewall, behind the battery for a rectangular black plastic box. Inside You'll find the pump's relay next to the horn's. The fuse for the fuel pump measures 20 amps and is also housed in the under hood fuse box. Signs the fuel delivery system needs attention include a no-start or faulty firing of the engine; reduced performance and acceleration; sputtering; stalling; dying and elevated operating temperatures. The associated fuse costs under $20 to replace and the relay averages $30-$50. Costs associated with replacing the entire pump range from $600-$900 in parts and labor.