V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

drained battery

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Old Dec 18, 2005 | 03:16 PM
  #1  
87 4cyl rag's Avatar
87 4cyl rag
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Default drained battery

Battery and altenator tested and good. After sitting two or three days a fully charged battery is dead. If I use the car it recharges enough to restart. What is using the charge? Help!
Old Dec 18, 2005 | 04:44 PM
  #2  
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Default RE: drained battery

hmmm those are the two main components on a charge...sounds like something is being left ON and draining the battery when it is sitting.
Old Dec 18, 2005 | 05:06 PM
  #3  
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Default RE: drained battery


ORIGINAL: Autobadges.com

hmmm those are the two main components on a charge...sounds like something is being left ON and draining the battery when it is sitting.
sounds right, do you have a light on or a radar detector or something pluged into the cigerate lighter outlet, or do you have some kind of aftermarket alarm on your car?
Old Dec 19, 2005 | 09:20 AM
  #4  
87 4cyl rag's Avatar
87 4cyl rag
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Default RE: drained battery

Nothing obvious left on.
Old Dec 19, 2005 | 12:56 PM
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Default RE: drained battery

ORIGINAL: 87 4cyl rag

Nothing obvious left on.
Take it to a shop and have them do an electrical draw test. Something is drawing power that shouldn't be.
Old Dec 19, 2005 | 09:57 PM
  #6  
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Default RE: drained battery

if it gets cold out, like freezing temperatures, the battery freezes up after a couple days of not running. make sure you start the car atleast once a day and run it for a couple minutes when the weather gets cold.
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