Low coolant warning light and bell...

Discussion in 'Kenworth Forum' started by nomad3d, Apr 16, 2016.

  1. nomad3d

    nomad3d Bobtail Member

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    May 17, 2013
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    We've got a 2011 KW T700 ISX. Low coolant light and bell going off, but coolant is fine. I replaced the sensor and checked the wiring and it looks good. What else should I be looking at and how do I turn off that infernal bell in the mean time?

    Thanks in advance
    Steve
     
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  3. realdesertkickin

    realdesertkickin Heavy Load Member

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    Id overfill it once past the line, just to see if that kills the alarm....
     
  4. nomad3d

    nomad3d Bobtail Member

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    May 17, 2013
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    I've done that too... A few times.
     
  5. realdesertkickin

    realdesertkickin Heavy Load Member

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    My pal sent me this...

    Ignition OFF, disconnect the harness connector at the coolant level switch.
    Install a 3A fused jumper wire between the signal circuit terminal and ground.
    Engine running, verify the low coolant indicator turns OFF.

    If the indicator does not turn OFF, test the signal circuit for an open/high resistance.
    If the indicator turns OFF, test the ground circuit for an open/high resistance.

    If all circuits test normal, replace the coolant level switch.
     
  6. nomad3d

    nomad3d Bobtail Member

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    May 17, 2013
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    I think that's a bit beyond my level of knowledge without knowing exactly which wires go where. That and I don't have an ohmmeter.
     
  7. nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    probably have broken wires between ecm and coolant sensor or maybe bad module if your truck has it for coolant supply voltage to sensor either way i think it's about time for a shop you did all you could.
     
  8. realdesertkickin

    realdesertkickin Heavy Load Member

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    Tustoned Arizona
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    I have used paperclip to buypass sensors...

    Ive bypassed the speed limiter, and the engine temp sensor before with no side affects...

    You seem like a smart feller, probably thought of the next 5 things Im gonna think of...so i quit, lol
     
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  9. Old school 362

    Old school 362 Medium Load Member

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    Pensacola Fl
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    Is truck shutting down. When alarm sounds
     
  10. nomad3d

    nomad3d Bobtail Member

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    May 17, 2013
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    Nope. Runs fine.
     
  11. kwcam

    kwcam Light Load Member

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    Dec 29, 2012
    at the shop
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    On almost all the truck I have seen the problem is a break/open in the wiring just back from the sensor in the rad tank, they vibrate and break inside the insulation so is hard to see, with out a multi meter and doing a wiggle test it may be hard to confirm, should show 5 volts. I normally cut the wires back 6" and crimp on new connectors, but as you say you want an easy fix, not sure on a T700 but behind the center dash panel (speedo/tach) there are little dip switches that can turn off/on alarms sometimes or cover the speaker with tape to mute it for now..
     
    Rideandrepair and nomad3d Thank this.
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