On Jan 23, 2:23 pm, "needfulperson" <maci....DeleteThis@yahoo.com> wrote:
> my grandmother's car is draining the battery she has a 1992 cadillac sedan
> de ville. i can not figure what is doing it. i think the auto suspenion is
> the problem but i am not sure can anyone help me with this problem.
>
> --
> Message posted usinghttp://www.talkaboutautos.com/group/alt.autos.cadillac..deville/
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How have you determined there is a drain, has it been measured? Has
the starting/charging system been checked, and by whom? If it truly
has a drain, and not just a faulty battery, or low charge output, it
can be isolated. Roll down all windows, and perform a visual for
obvious things(noises, glove box lamp). With an ammeter in line
measuring the draw, remove each fuse, one at a time, until the draw is
at it's minimum(usually around 12-15mA). The fuse that was removed and
caused the drop, is indicative of the affected circuit. Do not open
any doors, turn key on, or otherwise cause the current to ramp up over
the current limit rating of the meter, or you will blow fuses in
meter. Some vehicles have a power down feature that needs to time out
before a true draw test is meaningful, usually 10-20 minutes, this is
more common on later model vehicles though. Your vehicle has retained
accessory power, so a door needs to be opened after key off to disable
it. This may seem overwhelming to you, or not make any sense. If so,
you should probably consult a professional. This procedure is a bit
above entry level mechanics.
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