# Battery Drain
**URL:** https://forums.speedlife.net/t/battery-drain/130825
**Category:** SON240sx Automotive
**Created:** [January 14, 2010, 9:11am UTC](https://forums.speedlife.net/t/battery-drain/130825 "2010-01-14T09:11:10Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@s1495](https://forums.speedlife.net/u/s1495)
#### Post date: [January 14, 2010, 9:11am UTC](https://forums.speedlife.net/t/battery-drain/130825/1 "2010-01-14T09:11:10Z")
Hia people
I have a parasitic battery drain - I’ve looked around on the net & forums looking for typical resistance (ohm) values for nissan 240sx at the battery terminals (with battery unplugged obviously). I am losing 0.5 volts overnight. Alternator is good - quest putting out 14.1-14.4 volts constant, battery was replaced under warranty 2 days ago and still same issue. FSM doesn’t have what I am looking for.
It’s a 95 base model. When car is OFF (no accessories, no engine running, etc.) I am getting around 0.8 kOhms between positive & ground battery terminals so that tells me there’s a decent size short somewhere. I realize other factors such as constant power drains - remote starters, etc. can affect it so I am looking for someone with an electrically reliable working 240 to compare the resistance values.
Could anyone who has left their car for a week & still started it without removing the terminals please chime in 🙂
Thanks guys
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### Author:  [@m\_wolfenden](https://forums.speedlife.net/u/m_wolfenden)
#### Post date: [January 14, 2010, 9:26am UTC](https://forums.speedlife.net/t/battery-drain/130825/2 "2010-01-14T09:26:21Z")
wait till night…spray engine bay with spray bottle look for sparks…this is probably a bad idea but i would do it lol
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### Author:  [@renegade141](https://forums.speedlife.net/u/renegade141)
#### Post date: [January 14, 2010, 9:33am UTC](https://forums.speedlife.net/t/battery-drain/130825/3 "2010-01-14T09:33:24Z")
how much amperage draw are you getting?
If it’s less than 10amps, you can measure it with your multimeter.
unplug the negetive cable, and run a 10amp fuse inline from the post to the cable.
if it blows the fuse, its a high draw(don’t hook up multimeter).
if its doesn’t blow the fuse, then you can hook up the multimeter instead, and it will give a reading. (amperage reading)
that will give you an idea where to look for amperage draw, whether its a large eclectronic, or just a small problem.
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### Author:  [@renegade141](https://forums.speedlife.net/u/renegade141)
#### Post date: [January 14, 2010, 9:34am UTC](https://forums.speedlife.net/t/battery-drain/130825/4 "2010-01-14T09:34:27Z")
btw you do this with the key off
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### Author:  [@s1495](https://forums.speedlife.net/u/s1495)
#### Post date: [January 16, 2010, 7:42pm UTC](https://forums.speedlife.net/t/battery-drain/130825/5 "2010-01-16T19:42:39Z")
310 mAh drain so roughly 12v x 0.31 amps = 3.72 watts per hour drain… I’ll trace it by disconnecting fuses & measuring drain to see when it disappears. For now negative clamp off until I drive 😉
Thanks guys
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### Author:  [@Cyprian](https://forums.speedlife.net/u/Cyprian)
#### Post date: [January 16, 2010, 9:30pm UTC](https://forums.speedlife.net/t/battery-drain/130825/6 "2010-01-16T21:30:34Z")
^ That’s how a shop would start a basic diagnosis, connect the test light between the battery and the terminal, key off for 1-5 min then start pulling fuses.
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### Author:  [@Sizzlenut](https://forums.speedlife.net/u/Sizzlenut)
#### Post date: [January 26, 2010, 10:53am UTC](https://forums.speedlife.net/t/battery-drain/130825/7 "2010-01-26T10:53:22Z")
Even if you don’t have a test light, just pull fuses in the dark until you see one arc across the terminals, then you know there’s a draw.
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### Author:  [@s1495](https://forums.speedlife.net/u/s1495)
#### Post date: [February 28, 2010, 8:09pm UTC](https://forums.speedlife.net/t/battery-drain/130825/8 "2010-02-28T20:09:38Z")
Solved. Thanks guys. Tested using ammeter & pulled all accessory fuses - no change. Pulled 7.5 alt fuse and found the issue at the charge alternator connector I replaced a while ago (since old one had torn off). I used the connector from nissan quest which I wired up wrong causing the parasitic drain.
Correct wiring:
s14 alt charge connector quest alt charge connector
white w/red stripe ----- yellow w/stripe
yellow ----- blue
(CREDITS: this picture helped: [http://i36.photobucket.com/albums/e25/vancouverbc\_2008/alttt.jpg](http://i36.photobucket.com/albums/e25/vancouverbc_2008/alttt.jpg)
from this thread [http://forums.nicoclub.com/zerothread?id=253113](http://forums.nicoclub.com/zerothread?id=253113))
Now the battery drain at ignition off is 0.01 amps so about 0.12 watts (30 times less) for memory wire for audio, clock, etc.