Ford F5AZ-9275-A Sender Assembly

To check and replace the fuel level sensor, first, raise and secure the vehicle on jackstands. For models with an analog gauge, disconnect the electrical connector for the fuel level sensor and turn on the ignition key to check the gauge operation. Use a test light to find the terminal with battery voltage and ground the terminal without voltage to test the gauge response. For models with a digital instrument cluster, perform a similar test using a voltmeter or test light and a 15-ohm resistor. Remove the resistor and use a 150-ohm resistor to check the gauge response. For a more accurate check, remove the sensor from the fuel tank and check its resistance manually operating the float arm. To replace the sensor, remove the fuel tank from the vehicle if necessary, and carefully remove the sensor, disconnect the electrical connector, and install the new unit using a new O-ring between the tank and the sensor cover.

Remove the screws that secure the sending unit to the fuel pump assembly.

On 1998 and earlier models, disconnect the electrical connector at the pump. On 1999 and later models, the electrical connector is located in the harness and must be disconnected at the electrical connector away from the tank.