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Kawasaki KZ1300-A1 Quick Reference Manual Page 235

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MAINTENENCE--ELECTRICAL
Table K2
Regulator/Rectifier Output Voltage
Meter Range
Connections
30V DC
Meter (+)
-+
White/Red
Meter (-)
-+
Black
Check the alternator and regulator/rectifier to determine
which part is defective.
A/ternator inspection:
There are three types of alternator failures: short,
open (wire burned out), or loss in rotor magnetism.
A short or open in one of the coil wires will result in
either a low output, or no output at all. A loss in rotor
magnetism, which may be caused by dropping or hitting
the
alternator,
by leaving it near an electromagnetic
field, or just by aging, will result in low output.
-Remove the right side cover, remove the bolts (2),
pull out the 4-pin connector which connects the
regulator/rectifier
and
the alternator, and disconnect
the 4-pin connector.
-Connect the multimeter as shown in Table K3 to
check the alternator output voltage of each pair of
the three alternator output leads with no electrical
loads.
A. 4-pin Connector
B. Regulator/Rectifier
-Start the
engine,
run it at the rpm given in Table K3,
and note the voltage reading.
Table K3
Alternator Output Voltage
Meter Range
Connections
Reading
@4,000rpm
One Meter lead
-+
One yellow lead
250V AC
The other meter lead
-+
about50V
Another
yellow lead
(Total
of 3 measurements)
If the output voltage shows the value in Table K3,
the
alternator operates properly and the regulator/
rectifier is damaged
.
A much lower reading than that
given in the table indicates that the alternator is de-
fective
.
Check the starter coil resistance as
follows:
Reading
Battery Voltage-15V
-Stop the engine, set the mu Itimeter to the x 1 n
range, and measure for continuity between each pair
of the three alternator output leads. If there is more
resistance than shown
in
Table K4, or no meter reading
(infinity) for any two leads, the stator has an open
lead and must be
replaced.
Much less than this resis-
tance means the stator is shorted, and must be replaced.
Table K4
Stator Coil Resistance
Meter Range
Connections
Reading
One meter lead
-+
One yellow lead
0.50-
xl
n
The other meter lead
-+
0.76n
Another yellow lead
(Total of 3 measurements)
-Using the highest resistance range of the multimeter,
measu re the resistance between each of the yellow leads
and chassis ground. Any meter reading less than infinity
(00) indicates a short, necessitating stator
replacement.
If the stator coils have normal resistance, but the
voltage check showed the alternator to be defective;
then the rotor magnets have probably weakened, and the
rotor must be replaced.
Regulator/Rectifier
Rectifier inspection
-With the ignition switch turned off, remove the right
side cover, and disconnect the 4-pin connectors (2)
from the
regulator/rectifier.
-Using
the
x 10 or x 100 n range, check the resistance
in both directions between the wh ite/red lead and each
yellow lead (in the 4-pin connector which leads to the
alternator), and between the black lead and each
yellow lead.
There is a total of 12 measurements.
The
resistance
should be low in one direction and
more than ten times as much in the other direction.
If any two leads are low or high in both directions,
the rectifier is defective and must be
replaced.
A. Regulator/Rectifier
B. 4-pin Connector
235

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