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Tach signal N14 Celect,

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Catliner, Nov 14, 2014.

  1. Nov 14, 2014 #1
    Catliner

    Catliner Light Load Member

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    39
    Jan 5, 2014
    Thompson, GA
    0
    Where does an N14 Celect get its tach signal from?
    Before the tach would jump from normal to alittle under 500 rpms, now after a long run. It only moves between 0 and 500 and sometimes acts dead. Truck is a 1995 FLD 120
     
    Catliner, Nov 14, 2014
    Catliner, Nov 14, 2014
    #1
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  3. Nov 15, 2014 #2
    tw1005tx

    tw1005tx Light Load Member

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    Feb 24, 2011
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    Don't now where it comes from, but on one the plug on the back of the tack was causing it to be erratic tie wrapped it to keep it where worked.
     
    tw1005tx, Nov 15, 2014
    tw1005tx, Nov 15, 2014
    #2
    Catliner Thanks this.
  4. Nov 15, 2014 #3
    Catliner

    Catliner Light Load Member

    164
    39
    Jan 5, 2014
    Thompson, GA
    0
    Thanks . It was the wire on the back. Much appreciated.
     
    Catliner, Nov 15, 2014
    Catliner, Nov 15, 2014
    #3
  5. Nov 15, 2014 #4
    Pablo-UA

    Pablo-UA Road Train Member

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    Oct 11, 2010
    Borispol, Ukraine
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    usually rpm data transered by j1708 datalink

    but on old trucks tacho output from ecm was used and sometimes w signal from alternator
     
    Pablo-UA, Nov 15, 2014
    Pablo-UA, Nov 15, 2014
    #4
    Heavyd Thanks this.
  7. Nov 16, 2014 #5
    uvulabruzr

    uvulabruzr Bobtail Member

    36
    13
    Nov 1, 2014
    CANADA...EH
    0
    that model may have a separate sensor for the tach in the engine bell housing, threaded in the housing. adjustable by threading in by hand until it touches the flywheel then back it out half to three-quarters of a turn....
     
    uvulabruzr, Nov 16, 2014
    uvulabruzr, Nov 16, 2014
    #5
  8. Nov 16, 2014 #6
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
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    Oct 11, 2010
    Borispol, Ukraine
    0
    yep, I saw this additional sensor in DAF XF with N14. But w-output is also used.

    BTW, what truck? what year?
     
    Pablo-UA, Nov 16, 2014
    Pablo-UA, Nov 16, 2014
    #6
  9. Nov 17, 2014 #7
    JohnP3

    JohnP3 Road Train Member

    1,594
    684
    Feb 21, 2010
    Rock Creek B.C. Canada
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    The wiring diagram for an N14 shows the sensor and it going to #11 in the OEM connector, Every N14 I have worked on uses the sensor in the bell housing, I set them at 1/2 a turn.
     
    JohnP3, Nov 17, 2014
    JohnP3, Nov 17, 2014
    #7
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