S2000 Under The Hood S2000 Technical and Mechanical discussions.

Alternator not charging at low RPMs

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Old 08-17-2007, 05:49 PM
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Default Alternator not charging at low RPMs

2 alts have been tested. the original one wasnt charging at all, the second one im testing right now isnt charging at low RPMs, but at high rpms 6-9k itll charge.'

No EPS light
No CEL
There is only a Battery light on.

Any ideas on what could be the problem with the alternator??
Old 08-17-2007, 06:14 PM
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The voltage regulator inside, or the brushed are stuck.
Old 08-17-2007, 06:25 PM
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Got it tested again, and went through the manual book, all diodes are dead =/
Old 08-17-2007, 06:29 PM
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Yup. Need a new Alternator
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