SV: [Chrysler300] I'm Positive It's Negative

["Narve Nordanger" <narve.n@xxxxxxx>]

Having seen another 6V positive ground car with battery cables merely
swapped around by a previous unknowing owner (all cars must be negative
ground, huh?), resulting in a battery that had changed its internal polarity
according to my voltmeter, nothing is surprising in this matter.
As far as my limited knowledge goes, you should start by checking which way
the current flows from the generator/regulator. If the negative goes to
ground, you will need to re-magnetize it (I believe) in order to go original
again. As for the ampermeter, the current current reading problem might be
solved by switching the leads on the back?
If sticking with negative ground, your main concern should be the coil that
would need to have its primary circuit reversed for a long life (back to
normal flow direction, as the switching of ground has reversed the current
through the coil).

Narve
C-300 in Norway

-----Opprinnelig melding-----
Fra: Rich Barber [mailto:barber@xxxxxxxxx]
Sendt: 9. oktober 2004 07:22
Til: Chrysler 300 list service
Emne: [Chrysler300] I'm Positive It's Negative



In studying my 1955 C-300 and my 1955 Chrysler Service Manual, I note a
serious difference.  My car sure as heck has its ground cable connected
to the negative terminal of its 6-volt battery.  Everything seems to
work except the ammeter shows negative amps as it recharges the battery
and the radio doesn't work at all.

I recall there are techniques and requirements of polarizing the
generator and perhaps the voltage regulator, but I would sure appreciate
some input from the fire-by-wire types as to what might have happened to
my car's electrical system and what I should do next.  The car is the
way I got it in July, but anyone could have reversed the battery in the
past-accidentally or on purpose.  It was pretty much stored for 15 years
and the records indicate the battery has been replaced several times.
Assuming positive ground is truly proper, I'd like to make it right, but
am extremely reluctant to just reverse the battery and take the chances
of frying something or everything.

All help greatly appreciated.

Rich Barber
Brentwood, CA
C-300





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