Installation manual

DUAL OUTPUT ALTERNATORS
TROUBLESHOOTING
NOTE: Bejore 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] 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· BATIERY VOLTAGE REGULATOR IS DEFECTIVE
REGULATOR TEST POINTS AND PROPER VOLTAGE
Terminal/Color
Ignition on .
Ignition On Engine Running
I Brown o volts
2 -12 volts 14.2 volts
A Red
12.6 volts 12 volts 14.2 volts
S Orange o volts o volts 6-8volts
F Blu. o volts
10 -11 volts 4 -12 volts
All. 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 tenninal 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 tenninals 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.
NOTES:
o When the engine is first started, it takes a few moments
jar the alternator to "kick in" and take the load. There
is a noticeable change in the sound oj the engine and the
. RPM gauge will excite. .
o A slight whine is normal when running with a full load
on the alternator.
o When the alternator is producing high amperage, it will
become very hot.
o When replacing the alternator drive belts, always
purchase and replace dual belts in matched pairs.
Engines & Generators
35