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Re: Alternator resistance

To: C5813@aol.com
Subject: Re: Alternator resistance
From: Steven Laifman <av342@lafn.org>
Date: Sat, 21 Dec 1996 15:13:07 +0100
Paul,

There are two resistors under the hood.  One, however, is for the coil,
not the alternator.  The coil on many cars is really a 9 volt device,
not twelve.  The resistor is switched out of the circuit when cranking
the stareter to momentarily give twelve volts to the coil to enhance the
spark during start.  When the starter's job is over, and you return the
key to the "run" position, the resistor is put back in series withthe
coil and cuts the running voltage to the coil to it's 9 volt design. 
This is the Ford design.  Many European cars use real 12 volt coils, and
do not reduce the voltage when starting.  The coils run hotter, the
spark is higher, they are built to withstand the extra heat, and they
draw more current.  The Tigers with alternators still have the coil
voltage dropping resistor.  The generator resistor is for the regulator
cut-off.  I believe you will need an alternator regulator, and they come
in large and small "boxes", and some do not need the resistor.

Steve
-- 
Steve Laifman         < Find out what is most     >
B9472289              < important in your life    >
                      < and don't let it get away!>

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