Toro Spray Master Operator's Manual page 76

Testing Alternator Output
CAUTION
Attach meter test leads to the AC output terminals (the yellow wires) in the connector before
starting the engine. If the stator is grounded (damaged or worn) and the meter test leads
contact the center DC output pin (the red wire) in the connector, arcing could occur, damaging
the wiring.
When checking the alternator components, preform the tests in the following sequence:
1. Disconnect stator wire harness from regulator/rectifier.
2. Insert red test lead into VΩ receptacle in meter.
3. Insert black test lead into COM receptacle.
4. Rotate selector to V~ (AC volts) position.
5. Attach red and black test lead probes to the 2 AC output terminals (yellow wires) of the connector as
shown in Figure
Note:
You can attach the test lead probes to either AC output terminal.
1. Black probe (meter)
2. Red probe (meter)
3. Connector
4. Yellow wires
6. If no or low output is found, check for bare wires or other damage.
Note:
If shorted leads are not visible, replace the stator.
Note:
With the engine running at 3600 rpm, the alternator should output 16 V or more.
7. Connect stator wire harness to regulator/rectifier.
106.
Figure 106
5. Red wire
6. AC input terminals
7. DC output terminal
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