Electrical Component Tests; Diode Test - Briggs & Stratton Vanguard 05000 Manual

Test in the following sequence:
1. Set meter. See Figure 5.
2. Attach RED test lead clip to green output
terminal ([F] Fig. 31).
Fig. 31
3. Attach BLACK test lead clip to engine
ground. Output should be no less than 28
Volts AC @ 3600 RPM.
If is found:
no or low output
• Replace stator.
If alternator output is good:
• Test diodes located in wiring harness.

Diode Test

NOTE: One diode is for the charging circuit and
the other diode is for the lighting circuit.
In the Diode Test position, the meter will display
the forward voltage drop across the diode(s). If
the voltage drop is less than 0.7 volts, the meter
will "Bee p" once as well as display the voltage
drop. A continuous tone indicates continuity
(shorted diode). An incomplete circuit (open
diode) will be displayed as "OL."
Fig. 32
Charging Circuit Test (Red Wire)
1. Insert RED test lead into VΩ receptacle in
meter.
2. Insert BLACK test lead into COM
receptacle in meter.
3. Rotate selector to+))))) (DIODE TEST)
position. See Fi gure 9.
4. Attach BLACK test lead clip (A) to point
(B) of the RED wire (C), Fig. 32. (It may
be necessary to pierce wire with pin as
shown.)
5. Insert RED test lead (D) into harness
connector.
• If meter BEEPS once, diode is OK.
• If meter makes a CONT INUOUS TONE,
diode is shorted. Replace harness.
• If meter displays OL proceed to step 6.
6. Reverse test leads.
• If meter BEEPS once, diode is installed
backwards. Replace harness.
• If meter still displays OL, diode is open.
Replace harness.
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