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battery draw

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Old Mar 19, 2011 | 09:31 PM
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Default battery draw

Was wandering whats the best way to test for an unknown battery draw when the ignition is turned off? You know like anything that may draw juice from the battery when nothing is suppose to be on.
 
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Old Mar 19, 2011 | 10:51 PM
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Put a 12 volt test light in between the battery circuit. Remove the negative battery cable and touch one lead of the test light to the battery cable and the other lead of the light to the negative post. If the light burns then something is drawing power.
 
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Old Mar 20, 2011 | 02:34 PM
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Originally Posted by topfuel7
Put a 12 volt test light in between the battery circuit. Remove the negative battery cable and touch one lead of the test light to the battery cable and the other lead of the light to the negative post. If the light burns then something is drawing power.
Thanks I'll go try that right now.
Just wanted to make sure all is well before I button things up.
 
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Old Mar 20, 2011 | 04:07 PM
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Clamp on an ampmeter to the battery cable, if you get a reading, pull fuses till the reading goes away, then you'll know which circuit the drain is in.
 
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Old Mar 20, 2011 | 04:11 PM
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Originally Posted by 1skrewsloose
Clamp on an ampmeter to the battery cable, if you get a reading, pull fuses till the reading goes away, then you'll know which circuit the drain is in.
Thanks, I take it I will need this step if my test lite turns on hooking it between ground on battery and grounded cable?
My test lite seems to have grown legs.
 
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Old Mar 20, 2011 | 04:25 PM
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I just happen to have a clamp on ammeter, the test light will do the job. When the light goes out when you pull the fuse, that circuit is the bad boy.
 
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Old Mar 20, 2011 | 04:43 PM
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The only things that should have a voltage draw when the ignition is off is for the Radio memory, and an alarm if you have one. A switch were the return spring is weak could also cause a voltage draw. Like mentioned pulling one fuse at a time and see if the draw goes away is the way to check it.,,
 
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Old Mar 20, 2011 | 08:04 PM
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Originally Posted by big cahuna
The only things that should have a voltage draw when the ignition is off is for the Radio memory, and an alarm if you have one. A switch were the return spring is weak could also cause a voltage draw. Like mentioned pulling one fuse at a time and see if the draw goes away is the way to check it.,,
The radio memory draw kind of sucks because its wired to a breaker under the batwing which makes disconnecting a pain in the *** especially seeing as I just put it back on.
 

Last edited by RidemyEVO; Mar 20, 2011 at 08:16 PM.
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