With the test results you verified it is safe to say the trouble is not related to any work in the instrument panel or interior. You've proved the exciter wire is OK and isolated the charging problem to the alternator. It is my guess you'll fix it just by renewing the brushes, but that's just a guess based on statistics. At least you know where to focus your effort.
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Art Benstein near Baltimore
Today a man knocked on my door and asked for a small donation towards the local swimming pool, so I gave him a glass of water.
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