2017 389. All 4 speed sensors showing faults, no speedo.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Daledockery, Jul 27, 2024.

  1. Jul 27, 2024 #1
    Daledockery

    Daledockery Bobtail Member

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    May 2, 2019
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    After a truck wash, I lost my speedo and all four wheel sensors are showing faults, which has truck power reduced way down. I have tried to troubleshoot everything I could and am at a loss. Any insight would be helpful.
     
    Daledockery, Jul 27, 2024
    Daledockery, Jul 27, 2024
    #1
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  3. Jul 27, 2024 #2
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    Check the plugs/wiring on all your connections related to those items. Someone might have gotten a bit careless with the water and sprayed it into connectors or sliced open a wire.
     
    AModelCat, Jul 27, 2024
    AModelCat, Jul 27, 2024
    #2
  4. Jul 27, 2024 #3
    Daledockery

    Daledockery Bobtail Member

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    May 2, 2019
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    I've traced and checked, all that I could. Did find water in the bottom ecm plug, got it dried and had batteries disconnected for a couple hours. Didn't change anything, still same issues. Have a feeling something shorted out.
     
    Daledockery, Jul 27, 2024
    Daledockery, Jul 27, 2024
    #3
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