Buzzing noise from engine after dead battery was jumped. Lights were left on over nite. Now humming noise from engine.

Asked by Oct 19, 2016 at 09:38 AM about the 2004 Ford Taurus SE

Question type: Maintenance & Repair

2 Answers

60

That's the alternator running at maxx output desperately trying to charge the battery.

1 out of 1 people think this is helpful.
Best Answer

Thanks, my mechanic (no charge) felt it was an electric motor that does the job of back in the day setting the idle and it was trying to recalibrate.

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