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Registered
Join Date: Aug 2019
Posts: 11
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Stupid 911 Gen/Alt light question
When I crank and let my 911 idle my alternator light is on. If I increase the idle speed above 1000 rpms the light goes out. Is this normal? So does this mean that the alternator is not charging with the light on at below 1000 rpms and starts to charge at above 1000 rpms?
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08-02-2019, 02:57 PM
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Registered
Join Date: Mar 2014
Location: Palm Coast FL
Posts: 1,194
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Yes. Normal.
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78 911 st backdate 87 944 00 996 |
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08-02-2019, 04:24 PM
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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Year of 911 would help but yes some early 50A alts could cause a faint glow at idle. But by the 80s there should not be a light on. When the carbon brushes got worn down on mine it started glowing strongly at idle only.
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Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
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08-02-2019, 06:25 PM
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Registered
Join Date: Aug 2019
Posts: 11
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Manbridge. Jeff. It is a 74 911 with cis. There is a rebuilt 55 amp original Marchal alternator mounted.
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08-04-2019, 10:46 AM
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