Battery Charging

[Richard J Lebens]

The alternator light doesn't tell you anything about the battery, it tells you the alternator is not charging the battery.  If the alternator is spinning and producing a current flow, the current that creates the magnetic field in the rotor is generated by the alternator.  If the alternator is not spinning, like when you start the car, the current to create the magnetic field is supplied through the alternator light.  The light switches off due to the magic of diodes and equal voltage potentials,

----- Original Message ----
From: Max Hoepli <mhoepli at vif.com>
To: audi_owners_usa at yahoogroups.com
Cc: quattro at audifans.com; w-t_audifans at yahoogroups.com
Sent: Sunday, February 17, 2008 8:03:46 AM
Subject: Battery Charging

Hi all,



Any way of testing if the battery discharge light is really testing if the
battery is discharging? Battery discharge light on dash tests voltage?
Current?



1986 Type 44 Turbo Quattro



Max

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