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Battery is draining quick

Old May 10, 2022 | 11:53 AM
  #1  
Akp856400's Avatar
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Default Battery is draining quick

My battery is draining quick and I'm running 450 milliamps when it's shut off but I disconnected this little guy from my battery and it went down to 422 milliamps, where does this wire go, and does anyone have any suggestions about where my battery drain might be coming from
 
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Old May 10, 2022 | 05:01 PM
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habbyguy's Avatar
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From: Mesa, AZ
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Not sure where it goes, but whatever circuit it's supplying is not the real problem (less than 30mA of the 450mA drain).

Make sure you don't have dome lights on when you're looking for the problem (easy to miss, and of course, this will cause a MUCH higher battery drain).

There are a couple ways to troubleshoot parasitic drain like this...
1) Hook up an ammeter (I like my clamp-on DC ammeter, with a bluetooth "remote function" that allows you to leave the meter around the battery lead and watch your phone for readout). Pull fuses one at a time until the current drain drops to "normal". Then you at least know where to start looking.
2) Meaure the voltage across each fuse (happily, they have easy-to-access probe points). Since the fuses have some resistance, there will be a (small) voltage drop across a fuse that's got current flowing through it. The measured voltage, even on the "bad circuit", will be very small, measured in millivolts (a millivolt = 1/1000th of a volt). Here's a link to an easy chart that shows the readings you will get at typical current levels... pretty handy.
 
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Old May 11, 2022 | 09:47 AM
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From: South Africa, Czech Republic
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Agree the small 30 mA is probably to keep the clock etc , which will not couse problems , however close to half an amp is a problem , if you not sure and donts have the equipment rather take it to auto electrician , they have the tools to check properly , could be many things
 
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