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Registered
Join Date: Jul 2007
Posts: 1
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electrical
1975 911 carrera alternator light on very dim. Had alternator rebuilt with no change. Replaced external volt regulator no results. Replaced volt regulator second time and light stayed off for 20 minutes. Checked for shorts and continuity and car is charging. When car is started light is bright and when reving engine light is very dim. HELP!!
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07-18-2007, 10:01 AM
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AutoBahned
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have you had the battery tested?
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07-18-2007, 11:01 AM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Is your fanbelt tension correct?
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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07-18-2007, 12:32 PM
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Registered
Join Date: Feb 2006
Location: Ontario Canada
Posts: 2,947
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what did they do when they R and R ed your alternator , sounds like you have a back leaking diode in your bridge.
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1976 Yamaha XS360 ( Beats Walkin') 1978 911 SC Targa ( Yamaha Support Vehicle ) 2006 Audi A4 2.0T (Porsche Support Vehicle ) 2014 Audi A4 2.0T Technik (Audi Support Vehicle) |
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07-18-2007, 01:24 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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This is NOT a problem, merely an indication of resistance buildup due to oxidation or corrosion in the #61 Blue wire circuit between dash lamp and field windings connection at alternator. Clean the bulb holder with a good metal polish, clean the Faston tabs, and female Faston connectors!!!
Check your system Voltage while running normally. I think you will find it to be between 13.2 & 14.5 Volts. ps, This subject has been handled many times, including Bruce Anderson's Tech column in Excellence, and here on this board!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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07-18-2007, 01:38 PM
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