Question about 1996 Volkswagen Jetta

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1997 Jetta 3 , fuel injected fuel Gage stays empty, when I turn the ignition on gage moves up to zero/empty and no more,I have checked float unit with multimeter and the output is OK, but no voltage coming to floating unit, all fusees are OK, and have tried another used cluster and exactly same,Could this be a relay problem?, what relay works the gage?

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Most likely you have a bad sending unit on the fuel pump which tells how much fuel is in the tank, you will not be able to replace the fuel sending unit without replacing the fuel pump assembly. i would check the plug in for the fuel pump at the gas tank before replacing that pump.it may just have dirt in it or a bad connection in the plug in. if you do have to replace the sending unit,,,it's mounted on the side of the fuel pump inside the gas tank. make sure you mark the outside of the assembly before you remove it from the gas tank,, this will save you labor and time. if the pump does not go back EXACTLY AS it came out the fuel guage may not work,, or the pump may not work. i always mark the fuel pump with a black permanent marker on the tank assembly when removing the fuel pump... hope this helps you!!!

Posted on Aug 25, 2010

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Gauge is not connected to any relay,its a signal from the fuel pump sending unit, you do not get voltage from that wire for the sensor you need to use a multimeter and test for ohms, every manufature is different and cant recall what it should be empty or full.

Get a shop manual or even call the local repair shop/dealer and they might give you the information you are looking for, but sounds like you have a bad sending unit and need to replace it as an Assembly.

Posted on Aug 25, 2010

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