Re: [Peugeot-L] ALTERNATOR TEST.

On Sun, Jul 23, 2006 at 09:31:08PM -0700, Ben Pender wrote:
> David,
>
> Here is a good, on-car test of the charging system.
> All it requires is a good voltmeter.

Previous to the test, check that the battery light on the dash is lit before starting the engine. If the bulb is bad o the cable disconnected the alt wont work.

>
> Ok, start the engine and get it to a fast idle, like
> 1500 or so. Make sure the battery light on the dash
> is out. Now, without any electrical consumers on,
> check the system voltage. You can check on the
> battery, but checking directly on the alternator is
> even better. That voltage should be *at least* 13V,
> preferrable 13.25-14.5V.
>
> Now, turn on all the electrical consumers you can.
> You don't have to turn on the wipers since the w/s
> will be dry, but turn on the heater fan, the
> headlights, the rear window defroster, the hazard
> flashers, seat heaters, etc. Now, check the system
> voltage. It will probably have dropped slightly from
> the initial reading, but if that voltage is still at
> least 13, preferrably >13.25V, then your alternator is
> fine and is charging the system.
>
> If you're having problems with charging, then one
> thing to do is make sure that the alternator is
> grounded very well. Perhaps remove it and clean all
> the mounting areas, since they mainly ground through
> the alternator body through the mounting lugs to the
> engine. You could experiment and use a set of jumper
> cables and connect one end on the alternator body
> somewhere and the other end to the negative side of
> the battery. That way, you would have a known good
> ground path. Then you can repeat your tests. If the
> voltages are higher, then you will know that some if
> not all of your problem has to do with grounding
> issues.
>
> I hope this helps!
>
> Regards,
> Ben Pender
>
>
> --- david kips <kaptagatgaa@yahoo.com> wrote:
>
> > Does any one out there know how to test wheter the
> > alternator is bad or not while in the car?My 5 year
> > battery went dead, I put a good old battery which
> > worked good for two days. There was heavy rain and
> > flods and I might have had water go into the
> > alternator. After one day I jump-started the car,
> > moved it into a parking spot. A day later I started
> > and it started ok. Is it the alternator?, the
> > alternator is a rebuilt one-3years ago.
> > Thank you,
> > David
> >
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