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944 Ecology 944 Ecology is online now
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Join Date: Jul 2004
Location: Upstate New York
Posts: 3,278
On the early dash cars (including the 924S cars), the alternator light was necessary to provide the exciter voltage to the alternator. If the bulb was burned out, the alternator would not charge.

On the later cars, the exciter voltage comes directly from the battery (by way of the ignition switch).
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Good luck, George Beuselinck
Old 03-25-2013, 11:45 AM
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