Arctic Cat 660 cc Service Manual page 144

TESTING COMPONENTS
NOTE: Resistance tests of the engine electrical
components should be made using the Fluke Mul-
timeter only. Replace any component that does
not have a test value within specifications.
Rectifier (Positive Test)
1. Using an ohmmeter, connect the positive tester
probe to the B terminal and the negative tester
probe to each of the rectifier terminals. Take note
of which rectifier terminals register continuity.
2. Reverse the tester probes and repeat the test. Take
note of which terminals register continuity.
NOTE: Continuity should register in only one
direction. If there is continuity in the reverse direc-
tion on any of the terminals, replace the rectifier.
Alternator (Negative Test)
1. Using an ohmmeter, connect the positive tester
probe to the negative terminal and the negative
tester probe to each of the rectifier terminals. Take
note of which terminals register continuity.
2. Reverse the tester probes and repeat the test. Take
note of which terminals register continuity.
NOTE: Continuity should register in only one
direction. If there is continuity in the reverse direc-
tion on any of the terminals, replace the rectifier.
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AO306
0738-518
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Brushes
1. Measure the length of the brushes.
2. If the brushes measure less than the service limit
of 4.5 mm (0.178 in.), replace the brushes.
Rotor
1. Using an ohmmeter, measure the resistance
between the two brush contacts on the end of the
armature shaft.
NOTE: The service resistance specifications are
2.4-3.0 ± 20%.
2. Check the resistance between the slip ring and the
rotor. If there is continuity, the rotor is faulty and
must be replaced.
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