Alfa Romeo Bulletin Board & Forums - View Single Post - Give me your electrical 0.2 (HELP)
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post #19 of (permalink) Old 05-02-2017, 04:25 PM
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Join Date: May 2005
Posts: 5,291
Originally Posted by Alfajay View Post
Nothing normal about that. The light should be off when the engine is running. A soft glow (only visible at night) at idle is OK, but "gradually will get a brighter red with more rpm" is a sign that the alternator-regulator aren't charging.
really does sound like a failure of the alternator's regulator. At 4000 rpm it should put out 13.7 to 14.5 volts. climbing to just 10 volts means it is missing ⅓ of its output, typical of a diode failure.

Good Luck

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