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2G Battery Drain - possible culprits?

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952g63t

10+ Year Contributor
401
34
Mar 19, 2012
Summit Point, West_Virginia
The problem: On a full charge battery, tested & fully charged the engine struggles to crank over. After sitting for any amount of time the battery drains fairly quickly.

So far, I have confirmed that my alt is healthy and charges 13+ while running. Battery is good, tested and charged up.

The battery drain shows: .18 mA, running the meter from the disconnected ground cable to the main ground terminal.

I've disconnected just about every single clip connection inside the cabin area, and pulled all the fuses and relays from the interior fuse panel and engine fuse panel.

Disconnected door lock motors, pulled alarm fuse/relay chip from the orange clip under the drivers side kick panel.

Disconnected alarm components behind drivers side, disconnected radio, AC controller, ECU, wipers, and fuel pump.

I am running out of ideas on what to disconnect. Please post something that isn't listed, ill try anything at this point.

Thanks,
 
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So you've pulled ever fuse under the dash and under the engine bay and you still had the same amount of mA drain?
Separately, but yes. First I did the interior, then I did the engine bay.
 
Are you sure all your grounds are grounded? Battery > Firewall, Coilpack > Firewall, etc.
Pretty certain. I just recently replaced my main ground cables. I also added one from the block to the firewall. I don't remember what my coil pack ground looks like, you wouldn't happen to have a picture I could reference would you? I have my coil pack in a weird spot because of the SMIM I am running and don't remember the wiring exactly.

Thanks,
 
my vote would be a loose ground wire somewhere

Do you have an aftermarket radio, alarm, or remote starter? I have seen this issue at work many times due to aftermarket electronics not being properly wired/installed.

I have disconnected my radio and disabled the alarm according to this thread: http://www.dsmtuners.com/members/thefallen.143901/

No remote starter.

I am about to rip out my aftermarket gauge cluster to re-wire just to rule this out. But I have gone through it more than once already, maybe there is a short somewhere I didn't catch before. This is the last thing that is "aftermarket" that I installed, aside from my fuel pump rewire which is also disconnected. There might be short somewhere form previous owner that I missed. This has been driving me mad since I bought the car.

Thanks again for the input.

EDIT: I just pulled the positive cable from the battery to test the draw and its still showing .17/8 mA. Doesn't this mean that its a chassis short? The ground cable I'm using goes to the firewall.
 
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This can't be normal. Something is shorting on the chassis through ground. How is it even possible?

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