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  1. #1
    Join Date
    Dec 2019
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    amersham
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    152

    Fuel sender wiring

    On my car build i am now connecting up the loom to the various lights etc. Regarding the fuel sender with two connections, one earth and the other returning to the gauge i notice that on the sender there are no markings that indicate which wire goes where, is there any method that can tell me which is which, for instance if i connected up the tank to a positive and then a test lamp to the negative of a battery and then the other end of the test lamp to either of the two terminals on the sender, whichever lights up would indicate which is earth. A hairbrained idea or just desperate.
    Any solutions welcome.
    PS there is no fuel in the tank.

  2. #2
    Join Date
    Jun 2016
    Location
    Nantwich Cheshire
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    54
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    320
    If its the float type sender it doesn't matter as it's just acting like a variable resistor..

  3. #3
    Join Date
    May 2004
    Location
    Cowbridge, United Kingdom
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    62
    Posts
    10,134
    Is it a lucas sender?
    Kev Davies
    South Wales Area Rep. UKCC Membership Secretary
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  4. #4
    Join Date
    Dec 2019
    Location
    amersham
    Posts
    152
    Thanks
    Yes it is the float type, i remember well having to set the float at the correct level.
    I am pretty sure AK supplied it with the tank.

  5. #5
    Join Date
    Dec 2019
    Location
    amersham
    Posts
    152
    Double checked and its a Caerbont(Smiths) type TB9011/KIT which is listed as a insulated return Bimetal type.
    Its got 2 male blade connectors on top.The associated paperwork which came with the gauge does not make it clear what wiring goes where.

  6. #6
    Join Date
    Apr 2005
    Location
    Worcestershire
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    45
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    2,357
    Flip a coin, if it don’t work, flip it again

  7. #7
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
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    60
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    2,465
    Since it is insulated return it does now matter which connection you use; one you connevt to earth and the other to the gauge.
    Cheers

    Myles D-W

  8. #8
    Join Date
    Jun 2016
    Location
    Nantwich Cheshire
    Age
    54
    Posts
    320
    I'm pretty sure I have the same sender in my AK. I'll check the connections and let you know.

  9. #9
    Join Date
    Dec 2019
    Location
    amersham
    Posts
    152
    I am going to send an e-mail together with a photo of the setup showing the wires to Caerbont Automotive to see what they say. The fact that there are no markings + or - on the instrument would indicate that it does not matter which way the wires go round, but experience tells me that this is not always the case, historically green or black wire always represented earth, now that is not always the case particularly with world wide electrical imports (no names mentioned) so its best to check.

  10. #10
    Join Date
    Dec 2019
    Location
    amersham
    Posts
    152
    Thanks Incey

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