Detroit DD16 GHG14 (2014-16) Fault Code: SPN 677 FMI 7 (MCM, CPC) Engine Starter Relay Jammed
NOTE: Please see the step by step troubleshooting procedures for this specific code.
PROBABLE CAUSES:
1. Starter relay.
2. Starter relay wiring.
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Allison Transmission – WTEC 2 MD/HD/B SERIES TRANSMISSIONS
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