disco kev Posted October 5, 2008 Share Posted October 5, 2008 HELP i have replaced sender unit in tank all wiring looks ok but still no guage working fuel light is lit ???? Quote Link to comment Share on other sites More sharing options...
Richard Mills Posted October 6, 2008 Share Posted October 6, 2008 Hi There, The fuel guage can fail for a few reasons. A good first start is to get someone to watch the guage, ignition on , and connect the tank end of the wire to ground. This should then give full scale on the guage, though it takes a few seconds to move. If it moves then the fault is likely to be the earth connection to the tank sender. If it doesn't then it's into the instrument enclosure for the next test. A good thing to have is a multimeter. Cheap one from the likes of Maplin or B&Q about £5. This will help and will come in handy again for the next fault or bulb and fuse testing. The fuel guage circuit comes from the 12 volts line through a regulator, just for the instruments, through the guage, down to the tank sender, then to ground. It's nearly always the ground that fails due to corrosion somewhere. Quote Link to comment Share on other sites More sharing options...
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