Kenworth W900 N14 Celect, tack not working

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jdw900, Jan 20, 2021.

  1. Jdw900

    Jdw900 Bobtail Member

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    Jan 19, 2021
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    Hi I am new to this website and I need some help I have a 1992 kenword w900 N14 celect my tach is not working and I need to know if the signal comes from the cam/crank sensor with the 4 wires. Or those it have the sensor in the bell housing. Thanks for the help in advance
     
    blairandgretchen Thanks this.
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    I’ll probably get this wrong, but I think the tach reads off the bell housing.

    Remove and clean debris off magnet, or replace. Screw in till it touches, then back off 1 and a half turns then lock jamb nut.

    I think the cam/crank sensors deal with the ECM and start/no start.

    @Goodysnap ?
     
  4. blairandgretchen

    blairandgretchen Road Train Member

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    Add - I think you can run a multimeter across the terminals to measure resistance (can’t remember the value) - to check the sensor is ok.

    I think I just changed mine out.

    I believe the sensor on the tail shaft of the tranny is to the speedometer. Or I have these the wrong way round.
     
  5. Jdw900

    Jdw900 Bobtail Member

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    Jan 19, 2021
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    Ok I will check the sensor on the bell housing tomorrow can you tell me where is located. And thanks for the help
     
    blairandgretchen Thanks this.
  6. Dino soar

    Dino soar Road Train Member

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    The sensor on the back of the transmission is for the speedometer. If you have a sensor in the bell housing you'll see it with the wires coming out of it.

    If not then it runs off of one of your engine sensors.
     
    tommymonza Thanks this.
  7. blairandgretchen

    blairandgretchen Road Train Member

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    Depends - but it’s fairly obvious - the sensor with a couple of wires attached. Mine was bottom center.
     
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