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2002 Nissan Quest Question: problems with battery draining overnight

 

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Carol Jones, 3.3L V6, Greenwood, AR, February 09, 2010, 13:10
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When you pull the audio fuse out it pulls 12 volts from the battery, why? We have a new battery,starter,alternator done by professionals and they don't know the problem and can't do anything else to help us.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, February 09, 2010, 14:40
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     Master

    The radio, clock and PCM require constant memory and need power all the time to retain there memory, correct time display, radio presets ect.....
    An amp meter has to be put in series with the battery ground cable with the doors closed keys out of the ignition, remove the fuses one at a time and see which circuit is causing excess parasitic draw on the battery. About .025 Amp draw is normal for a modern car. You need a good wiring and fuse box schematic and a good DC amp meter.
    Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info .There is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You get a one year subscription to year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual. http://bit.ly/alldata_repair_manuals or try http://bit.ly/mitchell_repair_manuals_online and get an online repair manual subscription.

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