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voltage drop test

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Old Sep 19, 2005 | 03:59 PM
  #1  
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voltage drop test

i have a problem:
my car keeps dying after over night, and i would have to jump start it every day. i changed my battery 2 times from costco kirkland. im goin to do a voltage drop test and see what is eatting up my battery over night.

but do any of you guys have the same problem?

if you do what did you do to fix it?

im thinkin of relocating my battery, and put a extra batterly so everything has memory, maybe a smaller integra or civic battery some where

but help is needed
Old Sep 19, 2005 | 07:48 PM
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What year is your car?
Old Sep 19, 2005 | 08:45 PM
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a 90 240sx

this happen after i got into a accident kould be my radio tho.. it has died along time ago but i still use it


all the channels on my headunit died and only one rca works on it, i have to use a amp to hear sound from it but only one channel haha!
Old Sep 19, 2005 | 10:25 PM
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Yeah replace that radio. Also check to see if your glovebox light goes out when the glovebox is closed.

The correct test you want to do is measure the amperage draw with the ignition switch off. Put an ammeter between the battery negative pole and the negative battery cable.

Amperage should be somewhere around 0.5 amps. If it's higher than that, something is on when it shouldn't be. Since you mentioned your radio, I'd start by pulling the radio fuse from the fusebox and seeing if amperage drops significantly. If that's not it put the fuse back in and try another. Continue on in this manner until you find the source.
Old Sep 20, 2005 | 07:28 AM
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has any one had the same problem? and have you fixed it?

my friend had a simalar problem and a mechanic fixed it and said it was a problem with his ecu?
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