ELECTRICAL
5.13
ALTERNATOR OUTPUT TEST (AC AMP)
This test measures AC amperage from the alternator.
SMaximum alternator output will be indicated on the
meter. It is
not
necessary to increase engine RPM
above idle.
SPlace the red lead on the tester in the 10A jack.
STurn the selector dial to the AC amps (A) position.
SConnect the meter leads to the Yellow and Yellow/Red
wires leading from the alternator.
SStart the engine and let it idle. Reading should be a
minimum of 5A at idle.
CAUTION: This test simulates a “full load” on the alter-
nator. Do not perform this test longer than required to
obtain a reading or the alternator stator windings may
overheat. 10-15 seconds is acceptable.
Alternator Current Output:
Minimum of 5 AC Amps
To Calculate Available Alternator Output
70W
12V
= 5.8 Amps
I
=
P
E
I = Current in Amps
P = Power in Watts
E = Electromotive Force (Volts)
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