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post #1 of 6 (permalink) Old 12-27-2013, 07:48 PM Thread Starter
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Exclamation 2010 Chevy Cobalt LT Battery

I bought a used 2010 Chevy Cobalt LT (20, 500 miles) last year and have been experiencing problems with the battery intermittently dying. I have tried replacing the battery. A voltmeter revealed that there is a current draw on the battery even when the car and all accessories are completely shut off. I narrowed the draw to the 50 amp inline fuse in the 10 gauge wire in the trunk, although I wasn’t able to successfully trace it. Where does the wire go and what should I check in order to discover the cause of the problem?
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post #2 of 6 (permalink) Old 12-28-2013, 04:03 AM
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There is always drain on the battery to keep stuff alive like the RKE (remote keyless entry) module, theft module and that 50 amp fuse is the BCM 1 fuse also alive when car is not running. Battery should last a month before needing charging.

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post #3 of 6 (permalink) Old 12-28-2013, 05:47 AM
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What you have is called "Parastitic Drain" and whats causing that is that 50amp fuseable link is also known as Short to Ground, meaning, always turned on. So its drawing power all the time, even when turned off.

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post #4 of 6 (permalink) Old 12-28-2013, 08:33 AM
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whats the sense of a fuse that always draws power??

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post #5 of 6 (permalink) Old 12-28-2013, 10:46 AM
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Quote:
Originally Posted by tred07 View Post
whats the sense of a fuse that always draws power??
It's not the fuse that draws power it's the CPUs on the other end of that fuse to keep stuff alive like your radio clock, your alarm, your remote keyless entry and so on and so on....

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post #6 of 6 (permalink) Old 12-28-2013, 02:30 PM
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GM's are notorious for radios shorting and draining battery power when the vehicle is off.

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