1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 392Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 392

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DIAGNOSTICS
DIAGNOSTIC AIDS:
Check for the following conditions: Poor connection at ECMInspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed