BCM stop main battery from charging? anyone in phx or tucson have a w211 BCM for sale or that i can rent for an hour to see if it solves the problem?

long story but to start can the battery control module keep the main battery from charging or does it only control charging to the front aux battery?

long story but to start can the battery control module keep the main battery from charging or does it only control charging to the front aux battery?

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