1999 WINDSTAR Battery goes dead intermittently 30-60days

1999 windstar the van will start fine every day then out of the blue the battery is dead.Jump start and it will be fine for another 30-60 days.Ford checked it
and said there was no problem. The van doesn't act up enough for them to have it when its dead.The van has ford dealer add on alarm and aftermarket remote starter.Tryed 2 new batteries and ford reman starter.
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Are you driving it often enough & far enough to keep the battery charged? Tou also may have a bad alternator, even though it's charging OK.
BCV021 wrote:

battery is dead.Jump start and it will be fine for another 30-60 days.Ford checked it and said there was no problem. The van doesn't act up enough for them to have it when its dead.The van has ford dealer add on alarm and aftermarket remote starter.Tryed 2 new batteries and ford reman starter.
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I'd be looking at the alarm system and /or the remote starter....alarm first.
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