ALTERNATOR
Dual Circuit -Rectifier Plug Type
TESTING ALTERNATOR AC CIRCUIT (Lighting)
Connect load lamp to AC side of connector and ground
as shown in Fig. 172. Load lamp should light to full
brilliance at medium engine speed. If lamp does not light
or is very dim at medium speeds, stop engine and
remove blower housing and flywheel. Disconnect stator
ground wire as shown in Fig. 171.
Fig. 172 - Testing AC Lights Circuit Output
With #19236 VOA meter, check for continuity between
ground lead wire of AC coil and AC plug of connector as
shown in Fig. 173. Meter reading should show
continuity.
Fig. 173 - AC Continuity Test
Next, be sure ground lead terminal is not touching a
grounded surface, and check continuity from terminal to
ground. Figure 174. Meter should not show continuity.
If meter indicates continuity, coils are grounded and
defective. Examine black lead to be sure the insulation
is not worn or cut. Repair with tape and shellac if a bad
spot is found. If ground still exists, or if AC coils do not
show continuity, stator must be replaced.
Fig. 174 - Test for AC Output Ground Condition
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