![Batt light on, replaced Alternator due to 12v at battery during idle. L terminal is grounded, need a ecm? Thoughts? : r/mechanics Batt light on, replaced Alternator due to 12v at battery during idle. L terminal is grounded, need a ecm? Thoughts? : r/mechanics](https://external-preview.redd.it/M8O8Wtio2lXDo36KqcaKdZFajHBqUpqOwsDezPzsc78.png?width=640&crop=smart&format=pjpg&auto=webp&s=5ebb253715082338dd810d7a457dd993c08e0553)
Batt light on, replaced Alternator due to 12v at battery during idle. L terminal is grounded, need a ecm? Thoughts? : r/mechanics
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