If your battery is only 12.35v with the engine running, your alternator
is not working. Even a lousy battery would have a higher voltage if the
alternator was working properly. Check the wiring, if nothing is amiss,
replace/fix the alternator.
Nick
pugmanvancan wrote:
> Hi, am having a problem with the charging system on my car. Recently
> on a fully charged battery it has only been starting 2-3 times and
> then the battery is dead with only a few miles of driving. I've
> recharged the battery twice now and the same thing has happened. Today
> I finally went and bought a new multimeter as I couldn't find the one
> I already had. I tested the battery with the car at idle and got a
> reading of 12.35V. When the engine is acclerated to about 2,000rpm the
> reading didn't change when I'm sure it should rise to between 13-14V.
> This is all without any lights or accessories turned on. The
> alternator in the car is out of an '86 505 XN6 sedan. Do I need to
> take the car to an auto electrician for proper testing?? I've done
> some checking online and it seems I need a battery load tester and
> ammeter to properly test the charging circuit/alternator myself.
>
> Does anyone have any useful tips for self testing?? or should I pay up
> and have a professional do it??
>
> cheers
>
> Richard
>
>
>
>
>
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Received on Sat Sep 10 18:18:40 2005
