All your tests are between the alternator, engine and battery, none to the
body. On the 504, there is a ground lead from the block to the battery
mounting bracket which often breaks or is corroded and if equipped with
external regulator, there should also be a lead between the alternator
housing and the base of the regulator on the firewall behind the engine
which often breaks
----- Original Message -----
From: "(-Phil-)" <listacct@mindfart.com>
To: <peugeot-L@yahoogroups.com>
Sent: Wednesday, February 01, 2006 11:46 PM
Subject: Re: [Peugeot-L] 504D 79 Charging Problem
> Seems like the alternator is fine. You appear to have over 1 volt of loss
> between the alternator & battery though. I'd beef up this connection.
Add
> some well-routed heavy-gauge wiring from the B+ Alt. terminal to the
battery
> +.
>
> Even so, 13.2 is hardly a "dead" battery. If the voltage stays at 13.2
> minimum, the vehicle should never fail to start. Assuming a good battery,
> you could be dealing with a bad starter or the associated circuitry.
>
> -Phil
> ----- Original Message -----
> From: "chrislee51" <chrislee51@comcast.net>
> To: <peugeot-L@yahoogroups.com>
> Sent: Wednesday, February 01, 2006 8:39 PM
> Subject: [Peugeot-L] 504D 79 Charging Problem
>
>
> > Maybe I spoke a little too soon when I said "it works fine" regarding
> > my new alternator.
> >
> > The car in question is my '79 504 Diesel, 4-sp. manual.
> >
> > The in-dash charging indicator drops down into the red whenever the
> > engine idles with the headlights on, and if any accessories (heater
> > fan, wipers, etc.) are on in addition to the headlights, the indicator
> > drops into the red even with the car at cruising speed, on the freeway.
> >
> > I swapped in a known good battery from my other 504 and cleaned the
> > battery terminal connections, but there was no improvement.
> >
> > I measured negligible or zero resistance between the alt body and
> > engine block, alt body and batt -terminal, alt +terminal and batt
> > +terminal, alt +terminal and starter solenoid +terminal, and starter
> > solenoid +terminal and battery +terminal. With the engine at idle, no
> > accessories on, I measured ~15V at alt and 14.7v at batt and the in-
> > dash charging indicator read normal. With the engine at idle, all
> > accessories on, I measured ~14.5V at alt and ~13.2V at batt and the in-
> > dash charging indicator was into the red. With the engine at 1500rpm,
> > all accessories on, I measured ~15.5V at alt and ~15V at batt, but the
> > in-dash indicator was well into the red. During all these tests, the
> > voltages measured between alt body & engine block, alt body & battery -
> > terminal, and alt +terminal and batt +terminal were all negligible,
> > well under 1V.
> >
> > It seems to me that the charging system is healthy, but the car was
> > behaving this way when I bought it, and slowly got worse and worse
> > until the alt would not charge the battery even at freeway speeds. I
> > drove it from CA to WA like this. I had to roll-start the car one
> > morning on that trip, because the battery didn't have the juice to
> > turn the engine over. Thankfully, diesels only need electricity to
> > keep the fuel solenoid open and, of course, for accessories and lights.
> >
> > Anyway, there is obviously something that I need to learn about
> > charging systems. Could my voltage regulator be bad? Or is the in-
> > dash thermal voltmeter being a liar? It seemed accurate on that first
> > long trip, doing a good job of telling me that I was not charging my
> > battery!
> >
> > Thanks for all your suggestions!
> >
> > Chris Lee
> > Seattle, WA
> > '78 504D
> > '79 504D
> >
> >
> >
> >
> >
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Received on Thu Feb 2 04:01:25 2006
