Installation manual
DUAL
OUTPUT
ALTERNATORS
mOUBLESHOOTING
NOTE:
Before
troubleshooting,
make
certain
that
the
drive
belts
are
tight
and
the
batteries
are
in good
condition.
Regulator
Testing
The
red
"battery
sensing" wire A connects
to
the
battery,
it
must
always
read
battery
voltage.
If
battery voltage
is
not
present,
trace
the wire
for
a
bad
connection.
The
orange
wire S
should
read
0
volts
with the
key
off,
12
volts
[approximately
1
with
the
key
on.
If
the readings
are
incorrect,
trace
the
wire
for
a
bad
connection.
The
blue
wire F supplies current
to
the alternator
fields,
its
voltage
will
vary
depending
on
the battery charge
or
actual
load/rpm.
The
readings
can
vary
from
4 to
12
volts
with
the
key
on,
0
volts
with the
key
off.
KEY
ON
•
NO
VOLTAGE
REGULATOR
IS
.DEFECTIVE
KEY
OFF·
BATTERY
VOLTAGE
REGULATOR
IS
DEFECTIVE
REGULATOR
TEST
POINTS
AND
PROPER
VOLTAGE
Terminal/Color
Ignilion
Oil
Ignition
On
Engine
Running
I
Brown
o
volls
2
-12
volls
14.2volls
A
Red
12.6
volts
12volls
14.2
volls
S
Orange
o
volls
o
volls
6-8
volls
F
Blue
o
volts
10
-11volls 4 -12
volls
All.
Oulpul
12.6
volts
12
volls
14.2
volts
Alternator
Testing
The regulator is functioning properly
and
the
batteries
are
in
good condition.
1.
Test the
voltage
at
the
alternator
plug
with the engine
off-key
on.
The
voltage
at
the
alternator tenninal F
and
the
voltage<
in
the
plug
[blue
wire
F]
from the
regulator
should
read
the
same.
Z.
Hold a
screw
driver
close
[1/2"]
to
the
alternator
pulley.
If
voltage is
present
you
should
feel
the magnetic
field.
If
.not,
the
problem
may
be
the
brushes
[worn]
or
the
rotor
[open
circuit].
3.
Start the engine,
at
fast
idie
the
output terminals should
indicate
14.2
volts
[no·
load].
A reading
of
12.6
would
.
indic~te
the
alternator
is
not
performing
properly.
Apply a load
such
as
an
electric
bilge
pump,
the
voltage
should
maintain
at
least
13.8
volts.
13
volts orless
indicates the
alternator
is
faulty.
NOTES:
o
When
the
engine
is
first
started,
it
takes
a few
moments
for
the
alternator
to
"kick in"
and
take
the
wad.
There
is a noticeable
change
in
the
·sound
of
the
engine and
the
RPM gauge
will
excite.
o A slight
whine
is
normal
when
running
with a foil
load
on·
the
ailernator.
o
When
the
alternator is
producing
high
amperage,
it
will
become
very
hat.
o When
replacing
the
alternator
drive
belts,
always
purchase and
replace
dual
belts
in
matched
pairs.
Engines & Generators