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Thread: Fuel sending unit impedance

  1. #1
    Join Date
    Jan 2008
    Location
    Montreal Canada
    Posts
    500

    Default Fuel sending unit impedance

    What are the true ohms rating for the stock sending unit on a M715 ??

    I know that GM fuel gauges read 1 ohm @ Empty, 44 ohms @ Mid point, 88 ohms @ Full. What about the stock one ??

    Thanks
    Rockwells / Cummins / 3053A
    Combat wheels on 395 XML
    M104A1 trailer

  2. #2
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    The stock military fuel sending unit are not the same as any civilian ones.

    Empty 30 ohms

    Full 0 ohms

    This is OPPOSITE of the GM car senders used up to 1965 or so...

    If you were to use the older GM car sender, it would read full at empty and empty at full...

  3. #3
    Join Date
    Jan 2008
    Location
    Montreal Canada
    Posts
    500

    Default

    Thanks ... since i'm doing my 6bta swap ... i'll do as the same time all 12 volts gauges and bulbs. The sending unit is the only one that make me feel bad to changed ... so i will try to find something ....

    Thanks !!!
    Rockwells / Cummins / 3053A
    Combat wheels on 395 XML
    M104A1 trailer

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