Fuel Gauge Sender: Description and Operation
DescriptionThe fuel level sensor (part of the fuel pump module) changes resistance according to the level of fuel in the fuel tank, which varies the current flow through the gauge. The pointer position varies proportionately to the current flow.
The fuel pump / gauge module:
- is serviceable only as an assembly.
- contains a fuel level sensor made up of a variable resistor controlled by the level of an attached float in the fuel tank.
- when the fuel level is low, resistance in the fuel level sensor is low and movement of the gauge indicator dial is minimal (from EMPTY position).
- when the fuel level is high, the resistance in the fuel level sensor is high and gauge indicator dial movement is greater (further from the EMPTY position).
- controls low fuel indicator.