Question about Chrysler LeBaron

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1989 lebaron digetal dash replaced fuel sending unit but the gauge stays at little over half with a full tank or not

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  • cjsmoldt Sep 25, 2009

    yes it stays at the same spot we changed the pump that is how we found out the gauge wasn"t working we thought we had little better then half tank was going to drain tank and there was only a couple of gallons in the tank, put every thing back together gauge showed the same so we but in new sending unit also gauge showed the same.

  • cjsmoldt Sep 25, 2009

    I will try this thank you

  • cjsmoldt Sep 27, 2009

    This sounds what it is thank you very much. You will hear from me at diffant times wiyh other car solutions. thanks again.

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The fuel meter works on the principal of a potentiometer. As there is a float which is connected such that the position will determined by the amount of current passing through it. So either the floats damaged or the attachment has come off keeping the indicator fixed at a certain level which is reflected as the amount of fuel in the tank. Get the potentiometer & float assembly replaced..........................sodeep

Posted on Sep 26, 2009

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Okay the two major cause for this are a bad ground and a stuck float. witch happens when the sender unit is re installed in the tank. have you tested the ground to the sending unit? seeing this is a older car the ground wire is most likely corroded on the chassis of the car.

does the gauge always stay at a half even when under a half tank

Posted on Sep 25, 2009

  • michael schultz
    michael schultz Sep 25, 2009

    well the first thing is check the ground wire to the sending unit and if there is good ground their you will ne to take a jumper wire from a good ground source and jump it to the wire going to the gauge and see if the gauge moves. if the gauge doesn't move then the wire from the sender to the guage is bad if it does and you have good ground going to the sender then the float is stuck. but doesn't sound that way sounds like a bad wire and you will have to do those test before going any further. let me know when you do and i can help if you have any more question. good luck

    and if you have more question now please ask the more info i have the better i can help you


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You don;t say whether the fuel gauge is reading accurately, or whether it's always on empty. If the gauge is always showing empty, it's most likely a problem with the sending unit in the fuel tank. Check the resistance across the two terminals of the sending unit.

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Test the resistance of the sending unit with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

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