Crown Victoria V8-281 4.6L SFI (1998)
Fuel Gauge Sender: Description and Operation
Conventional Instrument Cluster
Low Fuel Level Warning
NOTE: The fuel gauge, battery voltage gauge and low fuel level warning switch are calibrated together; therefore, these components must all be
replaced when replacing ANY one of the components.
When the fuel level falls to approximately 1/8 of a tank, the low fuel indicator will illuminate.
The low fuel level warning switch:
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is designed to reduce fuel gauge needle fluctuation caused by fuel motion in the fuel tank.
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provides a low fuel warning when fuel gauge reads approximately 1/8 full.
Fuel Pump Module
The fuel pump module consists of the following features:
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A variable resistor is controlled by the level of an attached float in the fuel tank.
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When fuel level is low, resistance in the fuel level sender is low and movement of the gauge indicator pointer is minimal (from the EMPTY
position).
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When fuel level is high, the resistance in the fuel level sender is high and movement of the gauge pointer (from the EMPTY position) is
greater.
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The fuel level sender (part of fuel pump module) changes resistance according to the level of fuel in the fuel tank.