Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

overnight battery drain

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Old Oct 8, 2015 | 11:04 AM
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Default overnight battery drain

Hi everyone I have a 96 civic ex coupe with a/t I'm having a problem with the battery draining overnight I've done a parasitic draw test after pulling all the fuses and got nothing still have got a 2.88 amp draw from something not sure where to go now if anyone has had this problem or can point me in the right direction would be appreciated
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Old Oct 8, 2015 | 11:14 AM
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Default Re: overnight battery drain

Originally Posted by hpiwinner
got a 2.88 amp draw
2.88 amps is HUGE. Did you mean amps or milliamps?
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Old Oct 8, 2015 | 11:23 AM
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Default Re: overnight battery drain

It's amps
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Old Oct 8, 2015 | 11:29 AM
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Default Re: overnight battery drain

That's not parasitic drain. That's a colossal short to ground.

Check the battery and alternator cables as well as hood fuse box for a short to ground. Should be easy to find using a multimeter.
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Old Oct 8, 2015 | 11:35 AM
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Default Re: overnight battery drain

Yeah that's what I thought too I've pulled all of fuses under hood under dash disconnected starter and alternator also replaced with a new battery and cleaned up all ground wires
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Old Oct 8, 2015 | 11:41 AM
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Default Re: overnight battery drain

Originally Posted by hpiwinner
I've...disconnected starter and alternator
Where did you disconnect them^? At the starter and alternator or at the hood fuse box?

With all fuses removed from the hood fuse box, did you test the (+) battery side of each fuse receptacle in the box for a short?
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Old Oct 8, 2015 | 11:50 AM
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Default Re: overnight battery drain

I unplugged the alternator green plug and disconnected ground and positive to the starter and as for the fues box under the hood i removed them one by one
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Old Oct 8, 2015 | 11:53 AM
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Default Re: overnight battery drain

Please read my posts carefully. Disconnect the large starter and alternator cables at the hood fuse box and then retest for the 2-amp "drain".
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Old Oct 8, 2015 | 12:52 PM
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Default Re: overnight battery drain

Disconnecting the two cables to the fuse box under the hood now I have no positive to the fuse box
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Old Oct 8, 2015 | 01:50 PM
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Default Re: overnight battery drain

The fuse box gets voltage from the battery, not from the starter or alternator. Post pictures showing exactly what you disconnected.
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Old Oct 8, 2015 | 02:10 PM
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Default Re: overnight battery drain

Disregard the negative cable off to save some juice
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Old Oct 8, 2015 | 03:06 PM
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Default Re: overnight battery drain

You lost voltage to the fuse box because one of the cables you removed comes from the (+) battery post.

Disconnect the (+) battery connector and also the alternator and battery cable attached to the hood fuse box. Use a battery jumper cable to jump voltage from the (+) battery post to the hood fuse box battery bolt to bypass the starter cable. Then check for the 2-amp short.



Last edited by Former User; Oct 8, 2015 at 03:31 PM.
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Old Oct 8, 2015 | 04:44 PM
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Default Re: overnight battery drain

I'll perform this test they you just posted when i get back home Tuesday but i know for sure when i removed cable T101 alternator side with (+) to fuse box i didn't have the 2 amp short
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Old Oct 8, 2015 | 04:55 PM
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Default Re: overnight battery drain

Originally Posted by hpiwinner
when i removed cable T101 alternator side with (+) to fuse box i didn't have the 2 amp short
Not sure what you did here^
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Old Oct 8, 2015 | 05:12 PM
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Default Re: overnight battery drain

Battery post to fuse box connect and alternator cable from fuse box disconnected had little to none amp draw
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Old Oct 8, 2015 | 05:19 PM
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Default Re: overnight battery drain

By removing the battery post, you remove battery voltage to the fuse box, hence no drain. Do the test I mentioned.
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Old Oct 8, 2015 | 05:30 PM
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Default Re: overnight battery drain

Ok I'll do the test you mentioned this coming Tuesday when i get home

Not sure what to do after post will die out
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Old Oct 8, 2015 | 05:31 PM
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Default Re: overnight battery drain

Originally Posted by hpiwinner

Not sure what to do after post will die out
Not sure what you mean.
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Old Oct 8, 2015 | 05:34 PM
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Default Re: overnight battery drain

I'll let you know the results of the test next Tuesday and go from there
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Old Oct 9, 2015 | 04:55 AM
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Default Re: overnight battery drain

The battery will not die out as long as you remove the positive battery cable.
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Old Oct 9, 2015 | 05:20 AM
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Default Re: overnight battery drain

Thanks Tony but not the solution I'm looking for

Last edited by hpiwinner; Oct 9, 2015 at 05:54 AM.
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Old Oct 16, 2015 | 06:49 PM
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Default Re: overnight battery drain

I had the same problem but intermittent, it was a pain in the ****, tried pulling all the fuses still draining at the same rate, turned out to be the air conditioning relay (it runs a heater apparently) which was intermittently sticking on and draining at a hell of a rate, easily enough to drain the battery overnight.
I swapped the relay for the horn relay (same type fortunately) and that cured it, the good thing is if the horn stuck on .....well you'd certainly know about it
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