Actron Sunpro CP7673 - Alternator;Generator Output Test

6. ALTERNATOR/GENERATOR OUTPUT TEST
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PRELIMINARY CONNECTIONS ae = G2 LÖW | OWELL of
RED CLIP TO BATTERY (+) F = RPM
BLACK CLIP TO BATTERY (—) k g
A.Turn the test selector to the RPM position and put the range switch in the
HIGH position.
B. With engine stopped, disconnect large diameter wire at the “BAT” (+) terminal
of the alternator or “ARM” (D+) terminal of the generator.
C. Fasten the SHUNT BAR to the terminal at the alternator/generator and
reconnect the large wire to the other end of the SHUNT BAR.
D. Connect the RED test clip to the positive (+) terminal of the battery and the
BLACK test clip to the negative terminal of the battery. Clip the inductive
pickup over a spark plug wire.
E. Remove the high tension wire from the center tower of the distributor cap and
ground it using a jumper wire.
NOTE: On GM HEI equipped systems (8 cyi.), disconnect the “BAT” terminal from
the distributor connector.
F. Turn on all electrical accessories and crank the engine for 15 to 20 seconds.
G. Enable the ignition system by reconnecting the “BAT” terminal, start the
engine, and adjust the speed to1500 to 2000 RPM on the HIGH RPM scale.
H. Remove the test clips from the battery and connect the RED test clip to the
SHUNT BAR tab that is closest to the alternator/generator and connect the
BLACK test clip to the remaining tab on the SHUNT BAR.
|. Turn the test selector to the AMPS position and observe the AMPS scale on
the tester.
RESULTS: AMPERAGE MORE THAN 10% ABOVE RATED OUTPUT — Probable
shorted field circuit. Replace alternator/generator or repair wiring.
AMPERAGE WITHIN 10% OF RATED OUTPUT — Normal alternator/
generator.
AMPERAGE MORE THAN 10% BELOW RATED OUTPUT — Loose
fan belt, defective regulator or alternator/generator, poor connections,
open field curcuit.
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