I came out from work this afternoon to a dead battery in my '99 Taurus. I saw nothing left turned on. I got a jump and went to Autozone two miles away. By that time there was enough charge to restart the car. My battery checked good, but they said the car had a 4-1/2 amp draw when it was shut o…

Can a bad alternator run a battery down?

tardis March 9, 2011, 3:20am 2

Yes, but so can many of the electronic modules. Did you narrow the parasitic drain down to being the alternator, or are you just guessing?