We have a 2009 freightliner cascadia with a DD15 that won't crank. If you jump it at the starter it will not start but only turn over, even with key on. It is throwing code SPN 677 FMI 5, open circuit in starter relay. We have replaced the starter relay, and the wire that the code recommends checking from pin 21 at the ecm to the relay. We overlayed a whole new wire and still the same problem. It has us all stumped. Any help would be appreciated. Thank you
2009 freightliner no crank when turn key
Discussion in 'Freightliner Forum' started by rangerjunkyard, Aug 24, 2021.
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