Spn 876 fmi1 freightliner cascadia 2015(solved)

Discussion in 'Freightliner Forum' started by Bains, Aug 6, 2020.

  1. Bains

    Bains Bobtail Member

    Sep 20, 2018
    Hi everyone . Have cascadia 2015 with1.5m kms . Air conditioner stoped working and it was running really good . Reached in yard checked codes and found SPN876 FMI1 ( but there were no engine lights on dash).
    Asked mechanic and he said looks like AC compressor . I decided to drive it for another day . So today LOW VOLTAGE sign came up on dash . Alternator was charging only 11.8 .
    Had extra alternator in bunk , so changed it In rest area . After 45 minutes I was back on the road . And found air conditioner started working. Guessing ac compressor wasn’t getting enough voltage from faulty alternator .
    Thought it could be helpful for someone else in future .
    QUALITYTRUCK and RocketyMan Thank this.
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