Testing the rectifier
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|
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With alternator leads connected correctly to
main harness:
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(a)
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Disconnect lead from centre terminal at
rectifier.
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(b)
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Connect D.C. voltmeter (with 1 ohm resistor in
parallel). Red lead to earth (frame), black lead to
rectifier centre terminal (see Fig. J2).
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(c)
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Start engine and run at approx. 3,000 rev./min.
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CONCLUSIONS:
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If meter reading is equal to, or higher than the
value stated, the rectifier is satisfactory. A low
reading indicates a faulty rectifier. Remove and
bench test.
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Bench testing the rectifier
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Connect a 12 volt, 45-50 watt bulb and 12 volt
battery across terminals 2 and 1 (for a period not
exceeding 30 seconds). See Fig. J3.
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|
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Repeat test with reversed battery polarity.
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Carry out similar tests on terminals: Bolt and
1, Bolt and 3, 2 and 3.
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The test lamp shouid illuminate fully in one
direction only for each of the connections made.
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CONCLUSIONS:
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Rectifier must be replaced if
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(a)
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Bulb shows sign of illumination
in both direction
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for each connection made
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(b)
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Bulbshows no sign of illumination
in either direction
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