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Old 02-11-2011, 16:12   #1 (permalink)
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Would this kill a battery?

OK, it's been snowy around here lately. Two days ago I thought it would be a good idea to not let the wipers fully 'park', so if it snowed again they wouldn't be all the way down into the well in front of the WS and wouldn't get immobilized with packed snow/ice. So when I parked at the end of the day, I turned the key off before the wipers came down all the way.

But then today I went to start the car and it wouldn't crank. The dash lights did come on and it was not real cold at 35 degrees. I checked the battery with my DMM and it was down to 11.7 volts. The battery is only 1 year old and it's the right size.

Did the unparked wipers somehow drain the battery? Or is it just a coincidence?
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Old 02-11-2011, 16:23   #2 (permalink)
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Re: Would this kill a battery?

It's a coincidence. There's no power to the wipers with the key off.
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Old 02-11-2011, 17:50   #3 (permalink)
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Re: Would this kill a battery?

OK, thanks and that makes sense. I have been just driving it short trips and using the rear defrost and high blower setting a lot lately. It's on the trickle charger overnight...
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Old 02-11-2011, 18:12   #4 (permalink)
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Re: Would this kill a battery?

have you checked your cable ends on the battery... i know the cars i had and many i worked on gave dead battery signals like wouldnt start and typical stuff... after just adjusting the cables on battery the car popped right off
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Old 02-12-2011, 02:34   #5 (permalink)
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Re: Would this kill a battery?

As you suggest ,the short trips and using the high draw rear defrost etc. will probably have run the battery down . The overnight charge should cure the problem , but might be worthwhile checking alternator output with meter just to be 100% safe , for all the time it takes .
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Old 02-12-2011, 07:46   #6 (permalink)
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Re: Would this kill a battery?

Quote:
Originally Posted by 87_Crown_Vic View Post
have you checked your cable ends on the battery...
Yeah, that was the first thing I checked. It was put in just 9 months ago, so they were clean and tight. As was suggested, I'll be checking the charging system.
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