Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 2 - Troubleshooting
Page 24
4. Attach RED and BLACK test lead probes to AC
output terminals in white connector (yellow wires)
, Fig. 30. (Meter test clip leads may be
attached to either AC output terminal.)
5. With the engine running at 3600 RPM output
should be no less than:
26 Volts - 20 Amp System
Fig. 30
6. If no or low output is found, check for bare wires or
any other obvious defects. If “shorted” leads are
not visible, replace the stator.
Testing DC Output Charging Wire
A simple test may be performed to test the DC output
charging wire circuit. If a problem exists in the wiring, it
can be corrected before testing regulator-rectifier.
Leave stator wire harness disconnected from regulator-
rectifier.
Equipment key switch must be in
OFF position.
1. Insert
RED test lead into receptacle in meter.
2. Insert
BLACK test lead into receptacle in
meter.
3. Rotate selector to DC volts position.
4. Attach
RED test lead probe to DC output terminal
in white connector (red wire), Fig.31.
Fig. 31
5. Attach BLACK test lead probe to negative battery
terminal.
6. Turn equipment key switch to
ON position. Meter
should display battery voltage.
7. If meter does not display battery voltage, check for
blown fuse, broken, or shorted wires.
Testing Regulator-Rectifier
Regulator-rectifier will not function unless it is grounded
to engine. Make sure the regulator-rectifier is securely
mounted to engine.
To avoid blowing fuse in meter when testing DC output
of 20 amp system, the DC Shunt, Tool
#19468 is
required.
The DC Shunt must be installed on the negative (-)
terminal of the battery. All connections must be clean
and tight for correct amperage readings.
Connect stator wire harness to regulator-rectifier.
1. Install shunt on negative battery terminal.
2. Insert
RED test lead into receptacle in meter
and connect to
RED post terminal on shunt.
3. Insert
BLACK test lead into receptacle in
meter and connect to
BLACK post terminal on
shunt, Fig. 32.
CAUTION: Attach meter test leads to AC output
terminals in white connector (yellow wires) BEFORE
STARTING ENGINE. If stator is grounded (defective),
and meter test leads contact center DC output pin in
white connector (red wire), arcing may occur which
may damage wiring.
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