2011 Columbia 120

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Undeserving1, Aug 15, 2024.

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  2. MRMTRANS

    MRMTRANS Medium Load Member

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    Apr 28, 2015
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    Sounds like ICU is the problem. Vibration over time can cause them to malfunction.
     
  3. smh5260

    smh5260 Bobtail Member

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    Dec 8, 2023
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    Ok thank you any way to rig it up so I don’t have to replace that with different lights or something that’ll be cheap and easy?
     
  4. MRMTRANS

    MRMTRANS Medium Load Member

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    Apr 28, 2015
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    If speedo quit at the same time as lights, then I'm thinking it's ECU. You can try replacing a bulb to rule that out.
     
  5. smh5260

    smh5260 Bobtail Member

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    Dec 8, 2023
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    I did just check I have power going to the light sockets but replaced the bulbs and nothing so I’m confused here if I have lower going to the socket why not the lights powering on replaced lights to check for a burnt out one but nothing
     
  6. smh5260

    smh5260 Bobtail Member

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    Dec 8, 2023
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    Actually found the issue it’s a light bulb on the tachometer that keeps coming lose push it in and everything illuminates but won’t stay in keeps losing contact so just wanted to update always something
     
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