Fuel Level Sending Unit Sensor

The fuel level sending unit contains a variable resistor (track). As the float moves up or down, electrical resistance will change. Refer to INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS for Fuel Gauge testing. To test the gauge sending unit only, it must be removed from vehicle. The unit is a separate part of the lower fuel tank module information. Refer to MODULE - FUEL TANK  for procedures (remove only the upper section of the fuel pump module). Measure the resistance across the sending unit terminals. With float in up position, resistance should be 20 ohms (+/- 5%). With float in down position, resistance should be 220 ohms (+/- 5%).