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Alternator Problem (1983 MB 300D)
The dash alternator light was not on when I turned on the ignition key yesterday. I immediately checked the voltage from the alternator. It was not charging at all (12.2 volts which I assume was the battery). The light still was not on. I took the alternator off the car, and it checks out perfectly. This is new to me! Is there a fuseable link? Wiring problem? Any help really appreciated.
Richard |
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My alt wasn't charging the system at idle. Then it kept getting worse. I installed a battery float charger on the car and plugged it in everyday. Then with no warning my alt locked up a couple weeks ago and shredded the belts leaving me stranded 400 miles from home. I just upgraded to a 120 amp alt I got off ebay and it's a great improvement! Not sure I can help with your problem, but my alt would charge as long as I was moving, but idle was a no go. Maybe yours is doing the same?
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1985 300d smoke silver/red int. (204k) <--Sadie the 80's Mercedes from Hades! 1985 300TD 587 cabernet red/155 Creme (143k) 2007 Ford Expedition EL (54k) "Seems to me you bought a hobby... not a car" - My dad. |
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Quote:
If you don't have the Charging Light Bulb in the Circuit the Alternator is not supposed to charge.
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84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 05-01-2013 at 11:10 PM. |
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Chances are its a defective alternator/voltage regulator. Chances of it being a bad wire are slim but double check the negative batt cable.
I had this problem, replaced alternator(with comes with a voltage regulator) for $120 and the light did not come on again. These cars on great, they can run without alternator, voltage or belts. I made it home 500KM with none of these and did not overheat... lol. I will never.. ever... ever sell my 240D.
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1976 Mercedes 240D (Sold) 1985 Mercedes 300D Turbo Diesel: 500,000KM 1986 Mercedes 300E (Sold) 1988 Mercedes 300E (Sold) 2002 Mercedes C240 (Sold) 2008 Mercedes C350 4matic A great site for purchasing industrial rubber products! Industrial Rubber |
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