MIL and CEL on Bad acm or line heater short

Discussion in 'Freightliner Forum' started by Tships, May 6, 2022.

  1. Tships

    Tships Bobtail Member

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    May 6, 2022
    0
    Ok I have a 2016 cascadia DD15, I parked my truck for a week and came back and started it to charge the batteries and got fault code SPN 3599 FMI 4 both CEL and MIL are on so my question is how often does the ACM go bad on these trucks or is this more likely to be a short in the harness?
     
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