Pontiac FIREBIRD 1972 Service Manual page 786

6E-24 1972 PONTIAC SERVICE MANUAL
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BRUSH
INSULATED HOLDER T E R M I N A L
SCREW ASSEMBLY A N D SPACER
C A P A C I T O R ASSEMBLY
/
H E A T S I N K
131
RECTIFIER
G R O U N D E D BRIDGE
u
O H M M E T E R
Fig. 6E-33 10 DN Slip Ring End Frame Assembly
STATOR
If stator is to be checked and/or replaced:
1. Remove 3 stator lead attaching nuts and washers
(Fig. 6E-23).
2. Separate stator from end frame. The fit between sta-
tor frame and end frame is not tight, and the two can
be separated easily.
3. The stator windings may be checked with test lamp
or ohmmeter as follows:
a. To check for grounded windings, connect lamp or
ohmmeter from any stator lead to frame. If lamp
lights or ohmmeter reading is low the stator is
grounded (see Fig. 6E-26).
b. To test for opens, successively connect test lamp
or ohmmeter between stator leads. If lamp fails to
light and if ohmmeter reading is high, there is an
open in stator windings (see Fig. 6E-26).
c. A short circuit in stator windings is difficult to
locate without laboratory test equipment, due to
low resistance of windings. However, if all other
electrical checks are normal and alternator fails
to supply rated output, shorted stator windings
are indicated.
O H M M E T E R
H-
u
O H M M E T E R
u
O H M M E T E R
(CHECK FOR OPENS)
(CHECK FOR GROUNDS)
Fig. 6E-34 Checking Stator