Fuel Pump Test

Remove fuel tank filler cap. Turn ignition on. Listen for fuel pump operating noise. If noise is not present, check fuel pump relay and wiring harness between relay and pump. On Q45, check operation of fuel pump control unit. If okay, disconnect fuel pump/sender connector at fuel tank and check resistance across fuel pump winding terminals. See FUEL PUMP WINDING IDENTIFICATION table. Ohmmeter should read .5 ohm. If resistance is not correct, replace fuel pump.