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Thread: Pulling 2.5 A with everything off??

  1. #1
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    Pulling 2.5 A with everything off??

    Okay, maybe I am just missing something here, but finally got all the hardware and software setup and am ready to re-install computer and all back into the car.

    For one final check I decided to make sure everything really shuts down when I shut down the system.

    I would explain how all the wiring is done, but I would exceed the post limit to do that.... Anyhow I kept unpulling things to see when the 2.5A draw stop... it never did.

    So I pulled the wires coming directly off the battery and probed them, it was still showing a 2.5A draw... Just wires?????

    Is that normal?

    Any thoughts you have would be most appreciated.

  2. #2
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    What kiind of car?
    2-2.5A isnt all that uncommon for newer cars when shut off.

  3. #3
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    Quote Originally Posted by Iamthehor
    What kiind of car?
    2-2.5A isnt all that uncommon for newer cars when shut off.
    Well it is a 1984 Corvette, but that is not the issue... not in the car yet. The wire I was probing was a 12" RUN OF 12 gage wires from a test battery to my power header...

    But thanks for the thought....

    I wonder if it is just what the multimeter is pulling, but that wouldn't make sense either....

  4. #4
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    try unplugging usb devices, if you have any connected.

    and the ammeter shouldn't be pulling anything.. A quick check though, did you switch that terminal when going into ammeter mode? I think a lot of those multimeters require you to do this.. been a long time since I've checked teh amps coming out of something though so I forget.

    And I know you said you can't really discuss your wiring cause it'd take too long, but you think you could give a really short description? It'd help.

  5. #5
    Raw Wave rando's Avatar
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    2.5 amps at the battery when everything is off? You've got a problem there for sure! At that rate, your battery will die within a day or two at the most.

    I think you need to give a brief description of your setup (hardware wise) and how it's wired. Also, describe exactly what you did to take your measurement.

  6. #6
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    Quote Originally Posted by rando
    2.5 amps at the battery when everything is off? You've got a problem there for sure! At that rate, your battery will die within a day or two at the most.

    I think you need to give a brief description of your setup (hardware wise) and how it's wired. Also, describe exactly what you did to take your measurement.
    Note to self - dont try to be intelligent on the morning of jan 1.........

    my multimeter is autoranging - .2 - .25 amps is my normal draw w/o any extras hooked up

    2+ amps is bad in any case

  7. #7
    Raw Wave rando's Avatar
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    IMHO 250mA is also a bit high to keep your lead acid battery healthy.

  8. #8
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    How are you testing this? The ammeter has to be in series with the circuit, not parallel. (you can't check amps like you can volts)

  9. #9
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    Quote Originally Posted by rando
    IMHO 250mA is also a bit high to keep your lead acid battery healthy.
    when i worked at sears we would sometimes have to check for drains, and that seemed to be about normal for quite a few cars. especially considering that includes the light under the hood. mine gets cut in half with the light unplugged

  10. #10
    What can I say? I like serial. Curiosity's Avatar
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    Pull out all the fuses until it stops, if you really want to know what it is. That might mess up the radio anti-theft thing though.

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