Devices on inverter can keep cab air controls from working.

Discussion in 'International Forum' started by Tb0n3, Mar 28, 2020.

  1. Mar 28, 2020 #1
    Tb0n3

    Tb0n3 Road Train Member

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    I've got the strangest situation. I have a desktop for the truck that, when powered on, can apparently interfere with the J1939 bus and keep the cab air controls from functioning when the truck is started. This is both in auto-start, and regular keyed start. This is a 2019 LT with an integrated Eaton 2500W inverter/charger. The bus interference is just a guess, but it makes sense to me.
     
    Tb0n3, Mar 28, 2020
    Tb0n3, Mar 28, 2020
    #1
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  3. Mar 28, 2020 #2
    Snailexpress

    Snailexpress Road Train Member

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    Yes, bad invertor can create a mess with modern truck electronics.
     
    Snailexpress, Mar 28, 2020
    Snailexpress, Mar 28, 2020
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  4. Mar 28, 2020 #3
    Tb0n3

    Tb0n3 Road Train Member

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    Does it necessarily have to be a bad inverter to have poor filtering?
     
    Tb0n3, Mar 28, 2020
    Tb0n3, Mar 28, 2020
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  5. Mar 28, 2020 #4
    Snailexpress

    Snailexpress Road Train Member

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    EMI suppression is freaky science. Could be bad grounding/bonding, could be poor inverter design, could be faulty components in inverter circuit. J1939 could give you a lot of trouble as well.
    The desktop is computer?
     
    Snailexpress, Mar 28, 2020
    Snailexpress, Mar 28, 2020
    #4
  7. Mar 28, 2020 #5
    Tb0n3

    Tb0n3 Road Train Member

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    Yes. A mini-itx with an amd 3900X and rx 5700xt.
     
    Tb0n3, Mar 28, 2020
    Tb0n3, Mar 28, 2020
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  8. Mar 28, 2020 #6
    Snailexpress

    Snailexpress Road Train Member

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    Snailexpress, Mar 28, 2020
    Snailexpress, Mar 28, 2020
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  9. Mar 28, 2020 #7
    truckdriver31

    truckdriver31 Road Train Member

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    same with big cb radios
     
    truckdriver31, Mar 28, 2020
    truckdriver31, Mar 28, 2020
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