Your voltmeter shouldn't be in the red when you have over 13 volts at the battery, so either it's bad or the wiring to it is defective. It seems that problems with the voltmeter circuit can cause problems with the charging system and battery.
"(-Phil-)" <listacct@mindfart.com> wrote: 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 Sat Feb 4 10:28:52 2006
