Fuel Gauge
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The fuel level gauge informs the driver of the amount of fuel remaining in the tank. The fuel tank is a saddle tank design with variable resistance senders, driven by floats, that provide resistances related to fuel height, in each side, to the cluster via hardwired inputs. The fuel level is read from each fuel sender via a 2 wire input. The fuel sender shall provide variable resistance between 15 ohms + 2 ohms (empty tank) and 160 ohms + 4 ohms (full tank) for a forward sender. If the fuel level is low, the resistance in the fuel level sensor will be low, causing the gauge to indicate empty (E). When the fuel level is high, the resistance in the fuel level sensor is high, and the gauge indicates full (F).