Installation manual
DUAL
OUTPUT
ALTERNATORS
TROUBLESHOOTING
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
wireS
should read 0 volts with the key off, 12
volts [approximately] 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
Ignition
Off
Ignition
On
Engine
Running
I
Brown
0
volts
2
-12
volts
14.2
volts
A
Red
12.6
volts
12
volts
14.2
volts
S
Orange
0
volts
0
volts
6-
8
volts
F
Blue
0
volts
10
-11
volts
4 -12
volts
Alt.
Output
12.6
volts
12
volts
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 terminal F and
the voltage
in
the plug [blue wire
F]
from the regulator
should read the same.
2.
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 idle the output terminals should
indicate 14.2 volts [no load]. A reading
of
12.6 would
indicate 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 or less
indicates the alternator is faulty.
34
NOTES:
0 When the engine
is
first started, it takes a few moments
for
the alternator to "kick in" and take the load. There
is
a noticeable change
in
the sound
of
the engine and the
RPM
gauge will excite. '
D A slight whine is normal when running with a full load
on the alternator.
D When the alternator
is
producing high amperage, it will
become very hot.
D When replacing the alternator drive belts, always
purchase and replace dual belts
in
matched pairs.