Toro Spray Master Series Operator's Manual page 79

Testing the DC Output Charging Wire
Use this test to check the DC output charging wire circuit. If a wiring problem exists, you can correct it before
testing regulator/rectifier.
Leave stator wire harness disconnected from regulator-rectifier. Ignition switch must be in OFF position.
1. Turn the ignition switch to the
2. Disconnect stator wire harness from regulator/rectifier.
3. Insert red test lead into VΩ receptacle in meter.
4. Insert black test lead into COM receptacle.
5. Rotate selector to V~ (AC volts) position.
6. Attach red test lead probe to the red DC output terminal of the connector
7. Attach black test lead probe to negative battery terminal.
8. Turn ignition switch to the
Note:
Meter should display battery voltage.
Note:
Regulator-Rectifier Test
Testing the Regulator/Rectifier
You must install a DC shunt on the negative (-) terminal of the battery to avoid overloading the fuse in the meter
when testing the alternator output. Ensure that all electrical connections are clean and tight for accurate
amperage readings.
1. Connect stator wire harness to regulator/rectifier.
2. Install a DC shunt onto the negative battery terminal.
3. Insert red test lead into VΩ receptacle of the meter. Connect the other end of the red test lead to the
post terminal of the shunt
1. Black probe (meter)
2. Red probe (meter)
3. Black post terminal (shunt)
4. Insert black test lead in COM receptacle of the meter. Connect the other end of the black test lead to
the black post terminal of the shunt.
5. Rotate selector of the meter to 300 mV position.
6. With the engine running at 3600 RPM, the alternator should output 3-20 A.
Note:
Depending on battery voltage and/or current draw on system.
position.
OFF
position.
ON
Figure 107.
Figure 107
4. DC shunt
5. Post terminal (shunt)
79
(Figure 106).
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