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See steps 1-7
TestNumberg--OhmsTest
for Ohmmeter use
ROTOR AND STATOR TESTS ON OHMS X 1000 POSITION
Rotor--
The alternator rotor may be tested for open or grounded field coils.
To
check for opens, touch the test leads to each slip rJng.
If the meter
reading is near zero, (left end) the winding is not open.
If the meter
shows high reading (extreme right end of the scale), the winding is open
and the alternator should be repaired or replaced.
To check for grounds,
touch the test leads from either sllp ring to the rotor shaft or to the
rotor poles.
If the meter shows only a slight reading or none at all,
the field winding is not grounded.
If the meter reading is near zero
(left end), the winding is grounded and the alternator should be re-
paired or replaced.
Stator--
The alternator stator windings may be checked for grounds or opens.
Dis-
connect the three stator leads from the diodes before any test.
To check
for opens, successively connect the tester leads between each pair of
stator leads.
In each case, if the meter reading is near zero (left end),
the windings are not open.
If the meter shows a high reading, the winding
is open and the alternator should be repaired or replaced.
To check for
grounds, connect the tester leads to each stator lea_ and to the frame.
If the meter shows a full scale reading, the stator is not grounded,
if
the meter is near zero (left end), the stator winding is grounded to the
frame and the alternator should be repaired or replaced.
The purpose of this test is to confirm the presence of supply voltage to
the positive (+) or Battery (Bat) terminal of the Ignition Coil.
NO
VOLTAGE AT THIS POINT RESULTS IN A "NO START" CONDITION,
Perform this test as follows:
lm
2.
Place the Function Selector Switch of your Craftsman Analyzer in the
VOLTS position.
Place the RANGE SELECTOR in the 0-16 volts position.
Insert the BLACK OTHER TESTS lead in its corresponding socket on the
Analyzer.
Connect the BLACK clip to a good vehicle ground such as
the engine block or negative (-) battery post.
Connect the RED
clip to the to the positive (+) or battery_at)
terminal of the i__
R-
nition coil.
In the case of the General Motors HEI Syste_,,disconnect
_-e_Tn_ttery
(Bat) lead at the Distributor (on Integrai Coil
Systems) or at the coll (on External Coil Systems).
Insert the GM
Diagnostic Connector, Page 5 , Key No, 7 into the socket of this
disconnected wire and connect the RED clip to the adaptor.
IMPORTANT: DO NOT ALLOW THIS CONNECTION TO TOUCH GROUNDI
THE GREEN CLIP
IS NOT USED.
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