What Causes the Fuel Gauge Needle to Stop Moving?
1 Answers
The fuel gauge needle stops moving due to: 1. Issues with the fuel level sensor; 2. Problems with the fuel gauge circuit. Solutions include: 1. Checking whether the fuel level sensor plug on the fuel tank is loose, oxidized, or burnt, and observing if there is any sticking during the sliding process of the fuel level sensor; 2. Removing the instrument panel and using a multimeter and a pin to locate and test the circuit corresponding to the fuel gauge on the instrument panel. The fuel gauge operates via a float in the fuel tank connected to a metal rod. The end of the metal rod connected to the float links to a movable contact point on a variable resistor. The vertical position changes of the float on the fuel surface in the tank alter the position on the variable resistor via the metal rod. The variable resistor is then connected to the vehicle's fuel gauge, which controls the fuel gauge needle based on the amount of current flowing through the variable resistor.