Tip - Where Is the Fuel Pump Relay on a 2003 F-150? | eHow

Ford uses a fuel pump relay to control the fuel pump assembly in its 2003 F-150 series trucks. The relay receives low amperage battery voltage through the powertrain control module, which energizes the primary windings in the fuel pump relay and closes the normally open circuit in the relay. Higher amperage battery voltage is sent through the fuel...