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Thread: Current Leak in 1993 VW Corrado

  1. #1
    rikoski
    Guest rikoski's Avatar

    Default Current Leak in 1993 VW Corrado

    The battery goes dead if the car is not used for two or three days.

    I have replaced the battery and the fuse box with new units.

    An ammeter in series with the positive lead to the battery shows a small
    current draw with the ignition key turned off and removed. The draw does
    not go away if all of the fuses and relays are removed from the fuse box.

    The alternator checks good.

    Any suggestions?

  2. #2
    PeterD
    Guest PeterD's Avatar

    Default Current Leak in 1993 VW Corrado

    On Wed, 08 Jul 2009 18:41:35 -0400, rikoski@.............. wrote:

    >The battery goes dead if the car is not used for two or three days.
    >
    >I have replaced the battery and the fuse box with new units.
    >
    >An ammeter in series with the positive lead to the battery shows a small
    >current draw


    Define, exactly what this 'small' current draw is, in milliamps.

    >with the ignition key turned off and removed. The draw does
    >not go away if all of the fuses and relays are removed from the fuse box.
    >
    >The alternator checks good.
    >
    >Any suggestions?

  3. #3
    rikoski
    Guest rikoski's Avatar

    Default Current Leak in 1993 VW Corrado

    In article <3ssb55d3jknuqiofkfmbb65h2e8gbdp5j4@........>,
    PeterD <peter2@hipson.net> wrote:

    > On Wed, 08 Jul 2009 18:41:35 -0400, rikoski@.............. wrote:
    >
    > >The battery goes dead if the car is not used for two or three days.
    > >
    > >I have replaced the battery and the fuse box with new units.
    > >
    > >An ammeter in series with the positive lead to the battery shows a small
    > >current draw

    >
    > Define, exactly what this 'small' current draw is, in milliamps.


    With the security system disconnected it is 0.25 Amp. This is an
    improvement but the battery will die in less than two weeks; so I can
    just park the car and depend on its starting.

    >
    > >with the ignition key turned off and removed. The draw does
    > >not go away if all of the fuses and relays are removed from the fuse box.
    > >
    > >The alternator checks good.
    > >
    > >Any suggestions?

  4. #4
    dave AKA vwdoc1
    Guest dave AKA vwdoc1's Avatar

    Default Current Leak in 1993 VW Corrado

    Want to buy a Solar battery maintenance panel from VW? <g>

    2-3 days is too short a time.
    I found a problem like that on an Audi and it was defective wiring to the
    vanity mirror lighting.
    One on a '97 Passat that was a right front door handle
    One on my Jeeps where the wiring was crossed on the alternator and the
    alternator was bad.

    Maybe a defective headlight switch.

    Keep searching and you will find the problem and you don't have to
    disconnect the battery every night. ;-)
    --
    later,
    (One out of many daves)

    <rikoski@..............> wrote in message
    news:rikoski-3EA0EE.16305010072009@news.newsrazor.net...
    > In article <3ssb55d3jknuqiofkfmbb65h2e8gbdp5j4@........>,
    > PeterD <peter2@hipson.net> wrote:
    >
    >> On Wed, 08 Jul 2009 18:41:35 -0400, rikoski@.............. wrote:
    >>
    >> >The battery goes dead if the car is not used for two or three days.
    >> >
    >> >I have replaced the battery and the fuse box with new units.
    >> >
    >> >An ammeter in series with the positive lead to the battery shows a small
    >> >current draw

    >>
    >> Define, exactly what this 'small' current draw is, in milliamps.

    >
    > With the security system disconnected it is 0.25 Amp. This is an
    > improvement but the battery will die in less than two weeks; so I can
    > just park the car and depend on its starting.
    >
    >>
    >> >with the ignition key turned off and removed. The draw does
    >> >not go away if all of the fuses and relays are removed from the fuse
    >> >box.
    >> >
    >> >The alternator checks good.
    >> >
    >> >Any suggestions?

  5. #5
    PeterD
    Guest PeterD's Avatar

    Default Current Leak in 1993 VW Corrado

    On Fri, 10 Jul 2009 16:30:50 -0400, rikoski@.............. wrote:

    >In article <3ssb55d3jknuqiofkfmbb65h2e8gbdp5j4@........>,
    > PeterD <peter2@hipson.net> wrote:
    >
    >> On Wed, 08 Jul 2009 18:41:35 -0400, rikoski@.............. wrote:
    >>
    >> >The battery goes dead if the car is not used for two or three days.
    >> >
    >> >I have replaced the battery and the fuse box with new units.
    >> >
    >> >An ammeter in series with the positive lead to the battery shows a small
    >> >current draw

    >>
    >> Define, exactly what this 'small' current draw is, in milliamps.

    >
    >With the security system disconnected it is 0.25 Amp.


    Way too much. General 40 to 50 MA (that's 0.04 to 0.05) is considered
    the limit. Yea, 0.25 will run down the battery. There is a parasitic
    draw somewhere.

    I'd start by keeping the meter attached, and start pulling fuses. You
    will have to work on the dome light to keep it off, for those fuses
    that are only accessible with the door open (I'm not sure about your
    vehicle). I'm sure you will find something aftermarket added (audio
    system, GPS, whatever) that is drawing the current.

    > This is an
    >improvement but the battery will die in less than two weeks; so I can
    >just park the car and depend on its starting.
    >
    >>
    >> >with the ignition key turned off and removed. The draw does
    >> >not go away if all of the fuses and relays are removed from the fuse box.
    >> >
    >> >The alternator checks good.
    >> >
    >> >Any suggestions?

  6. #6
    DC
    Guest DC's Avatar

    Default Current Leak in 1993 VW Corrado


    > With the security system disconnected it is 0.25 Amp.


    250mA is a significant draw, and could indeed be expected to render an
    average battery flat in several days. If as I understand this is a new
    problem and nothing has been worked on or changed recently my pick would be
    glove box light, boot light or some other low illumination bulb not
    switching off. another possibility is an audio power amp remaining powered
    because of sticking contacts in an ignition switch / relay....

    Good luck, VERY frustrating.

    Dave

  7. #7
    SFC
    Guest SFC's Avatar

    Default Current Leak in 1993 VW Corrado

    <rikoski@..............> schreef in bericht
    news:rikoski-749A59.19113710072009@news.newsrazor.net...
    >
    > I have one of those VW solar panels. I bought it at a hamfest for 5
    > bucks. (I knew I'd find a use for it some day).
    >
    > But with this draw, I hope the sun shines at midnight.
    >
    > My mechanic did the following:
    >
    > 1. First replaced the battery since it was 8 years old.
    >
    > 2. Put an ammeter between the positive battery post and the clamp with
    > the wires that went to that post.
    >
    > 3. He pulled every fuse and relay and looked for a drop in the leakage
    > current.
    >
    > 4. When he didn't detect any change; he assumed the problem had to be at
    > the fuse panel itself due to resistance tracking.
    >
    > 5. So I found a brand new fuse panel (for a 93 Corrado--I'm proud of
    > that ) He replaced the panel. No difference.
    >
    > 6. He disconnected the security system which cut the leakage by 3/4.
    >
    > 7. He ran some test on the alternator and said it was okay.
    >
    > So I'm about to repeat his tracing myself. Maybe he missed something?
    >
    > Thanks for your help.
    >
    > Rick


    Your mechanic did the right thing but some electrical components don't have
    fuses. So pull the connectors of some of them. Also check for hidden in-line
    fuses on audio stuff.

    SFC

  8. #8
    rikoski
    Guest rikoski's Avatar

    Default Current Leak in 1993 VW Corrado

    In article <h39ije$4rs$1@lust.ihug.co.nz>,
    "DC" <chudley_del_@ihug.co.nz> wrote:

    >
    > > With the security system disconnected it is 0.25 Amp.

    >
    > 250mA is a significant draw, and could indeed be expected to render an
    > average battery flat in several days. If as I understand this is a new
    > problem and nothing has been worked on or changed recently my pick would be
    > glove box light, boot light or some other low illumination bulb not
    > switching off. another possibility is an audio power amp remaining powered
    > because of sticking contacts in an ignition switch / relay....
    >
    > Good luck, VERY frustrating.
    >
    > Dave


    Found the source of the problem: a current leak through one of the
    automatic seatbelt circuits.

    Thanks for all of your help.

  9. #9
    dave AKA vwdoc1
    Guest dave AKA vwdoc1's Avatar

    Default Current Leak in 1993 VW Corrado

    Had that same problem on a '91 Passat.
    Then the other seat belt system went bad soon after = same problem.

    <rikoski@..............> wrote in message
    news:rikoski-DD35D5.00204210102009@news.newsrazor.net...
    > In article <h39ije$4rs$1@lust.ihug.co.nz>,
    > "DC" <chudley_del_@ihug.co.nz> wrote:
    >
    >>
    >> > With the security system disconnected it is 0.25 Amp.

    >>
    >> 250mA is a significant draw, and could indeed be expected to render an
    >> average battery flat in several days. If as I understand this is a new
    >> problem and nothing has been worked on or changed recently my pick would
    >> be
    >> glove box light, boot light or some other low illumination bulb not
    >> switching off. another possibility is an audio power amp remaining
    >> powered
    >> because of sticking contacts in an ignition switch / relay....
    >>
    >> Good luck, VERY frustrating.
    >>
    >> Dave

    >
    > Found the source of the problem: a current leak through one of the
    > automatic seatbelt circuits.
    >
    > Thanks for all of your help.

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