Vt3c_eg

okay i have a 92 civic. i got a new battery. my problem is that when its unplug(ground) the battery drain out and the car wont start. in 24 hours the battery is dead. it still recharged but will later died out. i jump start my civic and it works fine. when i unplug ground to test if the alternator is bad(while its still running) it still run. meaning my alternator is good. im confuse if its the battery or something else. when i turn on my car i do see the battery light on the dash turn on.

98_EX_sleeper

its your alternator. it can store a charge for some time i know i had the same problem i saw the battery light come on didn't pay any attention to it for like 3 days and of course when i decide to go out for a ride the car dies on me come to find out my ALT. belt was gone so replaced that and shes good to go now

instructor74

An altinator can still charge but if the diode pack went out it will drain the battery. Do you have a dmm turn the car off and do an amp test on the battery

marcs1337

speak english

Jdmsoles

i honestly dont think its your alternator i think you have a parasitic load on your battery which is causing it to go out, did you recently install anything new to your car if you did then you might of gave it constant 12v which creates a parasitic load you can check it with a dmm to see if you do have one, but then again it could be the diodes in your alternator but at times it causes road noise coming out through the speakers, but check it with a dmm,or check with a vat40 or whatever system you can get to check diodes and chekc health on alternator. , GL man!

boostedcivicsir

get an amp meter.
disconnect the positive lead, put the red from the amp meter on the battery, and the black lead on the positive cable.

cross fingers, hope your draw isnt too much to smoke your meter.

see how bad the draw is, then start pulling fuses to see what circuit the short is on and fix it.

Jdmsoles

thats the test i was talking about ^^ but i wanted to see if he hooked anything new first

Vt3c_eg

thanks all for your help. it was the alternator. the thing was that it was unplug from the battery and i dont know how it will drain the battery. oh well got it fix!

boostedcivicsir

the alt can short out internally causing a draw.