10-04-2007, 11:44 AM
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Alfisti
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Join Date: May 2007
Location: Mebane, North Carolina (Don't ask!)
Posts: 263
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Alternator not charging until ...
...I touch the lead with 12 volts.
Once I start my Verde, the alternator does not seem to begin recharging. Testing the battery shows 12-12.5. It is only after I connect an alligator clip to the positive post, and touch the alternator lead can I "hear" it kick in and volts are up to 13.5 - 15. 
As there an alternator light somewhere I'm missing? What else signals the alternator to start charging? |
10-04-2007, 11:47 AM
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Registered User
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Join Date: Jul 2005
Location: augusta ks.
Posts: 1,760
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there is a light on the dashboard, marked "generat" i think, which lights up befor starting the engine and goes out if the alt is charging. if it burns out, or the wireing is bad, the alternator will not charge.
cliff
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10-08-2007, 04:09 PM
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Registered User
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Join Date: Oct 2006
Posts: 1
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Sounds that you're regulator is not working. Is it built in within the altenator or is it an external one?
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10-24-2007, 08:18 PM
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Fly Tying Alfaholic
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Join Date: Jul 2006
Location: Savannah, Georgia
Posts: 258
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This will give you a clear explanation of your problem, but read carefull.
Good luck
Pelican Technical Article: Alternator System Troubleshooting
It's for a Porsche but the electrical systems for this period cars are the same.
All the best
Rob
__________________
1976 2000 GTV, Euro version Dell'Orto carbs for sale.
1965 Giulia Super 1600, matching numbers.
1600 GTA engine. In process of rebuild.
1968 GT 1300 Junior, sold 02/02/2008
1971 Giulia 2.1 Liter Super, sold 05/29/2008
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10-25-2007, 02:57 AM
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Darth Slacker
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Join Date: Mar 2006
Location: Northern NY, USA
Posts: 8,666
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 Quote:
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In the Bosch system, the size of the charge warning lamp bulb is critical. Too low a wattage bulb will not supply enough field current for "bootstrap" operation to be reliable. The Bosch book that I have states that the lamps must be at least 2 watts for 12 volt systems. If you have replaced your charge warning lamp recently, then too small a lamp may be your culprit.
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I wonder if that's relative to some of the other folks who get the glowing light til they rap the throttle once to wake up the alternator.
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10-25-2007, 05:55 AM
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Trained Professional
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Join Date: Feb 2003
Location: New Jersey USA
Posts: 8,246
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Quote:
Originally Posted by Tifosi
Who'da thunk it.
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__________________
Jim
Series 1 Euro 1750 GTV
Series 2 USA 1750 GTV
Series 3 Spider Veloce
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10-25-2007, 07:16 AM
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ReAlfisted 3/06
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Join Date: Sep 2005
Location: In the Garage
Posts: 6,653
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Quote:
Originally Posted by Tifosi
Who'da thunk it.
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 and here I thought you knew everything
  
__________________
Loud pipes save lives.
Ride hard or stay home - but, then again, the Alfa stays garaged when it rains.
1973 GTV - bought 3/06 (intend to keep forever)
1969 GTV, #AR1530021 - sold 10/72 (guess didn't intend to keep forever)
Current project: '69 Corvette bought in '73, DD '73 - '80, in storage 1989-2002, now apart (#1 on the Bucket list)
Last finished project: '75 Honda 750 bought new, DD '75 - '79 - in storage 26 years (1984 - 6/09) - an EZ resto
Favorite weapon: Browning A-Bolt .300 WM with 200 grain handloaded Noslers & a Leopold 2x7 or my Benjamin 312 with open sights.
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10-25-2007, 10:27 AM
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Darth Slacker
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Join Date: Mar 2006
Location: Northern NY, USA
Posts: 8,666
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Quote:
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Originally Posted by papajam
I posted on this BB a few years
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Quote:
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Originally Posted by lowmileage
I thought you knew everything
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Yeah, don't I wish.
Actually the only thing I want to know everything about is next weeks winning lottery ticket numbers.
hehe
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12-30-2007, 07:59 PM
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Registered User
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Join Date: Dec 2006
Posts: 5
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But, where is the problem if the alternator light is on when the engine is not running, but off when the engine is running? I have checked all green wire connections and replaced the voltage regulator on my "86 spider's rebuilt Bosch alternator but haven't cured the problem.
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12-30-2007, 08:26 PM
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Darth Slacker
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Join Date: Mar 2006
Location: Northern NY, USA
Posts: 8,666
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Quote:
Originally Posted by silvrobe
But, where is the problem if the alternator light is on when the engine is not running, but off when the engine is running?
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Engine not running = no alternator output = light on telling you that the charging system isn't functioning, which it isn't because the engine isn't running and turning the alternator pulley.....
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12-31-2007, 08:30 AM
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Registered User
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Join Date: Dec 2006
Posts: 5
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So, your alternator light stays on continuously when the car is parked with the key out of the ignition? I have never had any other car do this.
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12-31-2007, 10:43 AM
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Darth Slacker
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Join Date: Mar 2006
Location: Northern NY, USA
Posts: 8,666
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You didn't say 'key out of the ignition' you said 'not running'. (worlds of difference)
I've no idea why the light would stay on in that circumstance, or even how it could if all the wiring was correct.
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