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  #1  
Old 03-02-2020, 02:32 PM
timtenor timtenor is offline
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2005 Altima Sedan
 
Join Date: Feb 2020
Posts: 1
Question Battery Draining with Ignition Off

I am having a very strange problem with my 2005 3.5L Altima. My battery is getting completely discharged with the car just sitting, with no key in the ignition. I finally traced the current drain to the generator itself. With a fully charged battery, it's draining at a 5 amp rate, and eventually of course it completely discharges the battery. To verify, when I disconnect the cable from the generator, the leakage immediately drops to 0.0.

Also, if I jump start the car, a lot of weird behavior occurs. Engine speed starts oscillating from idle speed up to about 1700 RPM. It ramps up, then drops back to idle, over a period of about 2 seconds. Additionally, the charge indicator warning light comes on, as well as the ABS and TCS warning lights. No codes are being set.
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Old 03-11-2020, 06:17 PM
jcg0324 jcg0324 is offline
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2011 Altima Sedan
2011 Altima 2.5s
 
Join Date: Jan 2016
Location: Philadelphia
Posts: 40
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Worn or burnt diodes inside the alternator can cause a reverse current that will drain your battery. I would have that alternator tested. I believe that places like autozone will do it for free.
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