Fuel gauge does not work shows full after starting car.
May 6, 2019 at 7:11 AM
Fuel gauge not working
2003 NISSAN MAXIMA
ED FUCHS
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Hello,
This sounds like you have a short circuit within the fuel gauge circuit itself. When ever you have the positive and the negative shorted within a gauge's circuit, they will always peg out when voltage is applied to the circuit This is because the gauge instead of getting a lower voltage as it normally does, with the sensor acting a sort of variable resistor, is getting full battery voltage from the short circuit, pegging it. In the diagrams down below I have included the wiring diagrams for your vehicle's engine control circuits. The fuel sending unit and the wires you need to check for frayed insulation and causing a short circuit are all highlighted for you. Please go through these and get back to us with what you are able to find out.
Thanks,
Alex
2CarPros
This sounds like you have a short circuit within the fuel gauge circuit itself. When ever you have the positive and the negative shorted within a gauge's circuit, they will always peg out when voltage is applied to the circuit This is because the gauge instead of getting a lower voltage as it normally does, with the sensor acting a sort of variable resistor, is getting full battery voltage from the short circuit, pegging it. In the diagrams down below I have included the wiring diagrams for your vehicle's engine control circuits. The fuel sending unit and the wires you need to check for frayed insulation and causing a short circuit are all highlighted for you. Please go through these and get back to us with what you are able to find out.
Thanks,
Alex
2CarPros
Images (Click to enlarge)
May 6, 2019 at 10:03 PM
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