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FinallyGotOne's Avatar
 
Join Date: Sep 2006
Location: Southern Denver, Colorado
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Porsche Crest Another Tip: If your alternator light burns out in the dash, you alt will STOP charg

I was surprised to hear this, but if you do not see your alternator light (red light on 2nd guage over in middle of guage on 79 911 SC) turn on when you start your car, you should replace teh bulb asap. If that littlelight is blown, it no longer completes the circuit and the alternator will NOT charge! crazy eh!

Old 03-07-2007, 02:03 PM
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Join Date: Dec 2005
Location: florida
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thats interesting--thanks for the tip
Old 03-08-2007, 04:04 PM
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Zeke's Avatar
 
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You are spot on here. Warren can explain it (along with dozens of other guys), but it is part of the circuit.
Old 03-08-2007, 04:15 PM
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Location: Scottsville Va
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It is inline between the ign switch and the D+ on the alt. If that circuit isn't completed it won't excite the regulator..............no charge. Lots of older cars ran like this. I watched a guy pull his hair out trying to figure out why an old Datsun wouldn't charge. Nobody in the shop liked the guy so we all just let him struggle.
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Old 03-08-2007, 04:56 PM
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usually it's not the bulb.

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Old 03-08-2007, 05:48 PM
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