The petrol light stays on and gauge wont move after fuel has been put in. Why?

Pull the wire off fuel tank to the sender unit earth it out with ignition on.The fuel gauge should go to full slow even motion if it does replace unit in petrol tank.If it doest move you need new fuel gauge.Also before any of this i sumise you have checked fuse

Hi Singo the light and gauge are seperate systems that's why they are reading wrong. It's most likely the sensor in the tank of worst case an ECU fault. You will need someone to look at it for you because Renault electrical systems are very temperament and a wrong move could cause other more serious problems. Regards Jim...

I'm guessing petrol is the US equivalent to gasoline so you either have a problem with the gauge or the sensor that sends fuel level info to the gauge which is located in the gas tank.

two faults one could be fuse if not then fuel pump in the tank faulty

I put my cables on the wrong way and cost me money because I burnt out part of my computer system. I feel you should get some one with experience to look at it.

hi there I have a citroen xsara 1.4 the fuel gauge is constantly stuck on the red is there a fuse for this?

do you know that petrol gauge is a sort of volt meter.there are five things requir to operate it.1st of all see to it that movement of gauge is working.give 1.5v of a battery directly to gauge for amoment if gauge doesn't move change the -ve to +ve even then it doesn't move it means gauge itself is faulty.if it moved look out for a wirewound resistor in fuel tank.if it is open then gauge will not work.if that is good look for voltage across resistor normally 12v are given.if 12 volts are there then look out for flot.connect a voltmeter to gauge,move the flot by hand very slowly and see if the varition in volt meter if it is not there then look out for connecting wires from gauge to fuel tank.i think you can do it now

Sounds as though the tank sensor is faulty. Access through top of petrol tank, note the wiring colours and position. Lift out and check condition of float and the rheostat wiring and slider. Get a replacement from EB spares

Sounds like the Fuel sender unit in the fuel tank needs replacing however you may want to check that the electrical plugs are contacting properly,Check that the gauge is working by putting a piece of wire from the sender unit wire to the chassis,at the fuel tank sender unit plug,Turn ignition on while watching gauge if it moves toward fill turn ignition off and remove wire to chassis.If gauge moves it means from the fuel tank to fuel gauge is intact and not your problem.

Do you mean that the gauge registers as empty, even after the tank is filled? Probably the sending unit needs to be replaced (it's in the tank, likely partially attached to the fuel pump).