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Battery Lite is inttermitent. Diag Code P1637 Generator L Term Ckt
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Sounds like the alternator is intermittently failing.
Thought that myself so I had it checked. OK Then went through about a thousand web sites and started to fear the worst, a 'new' PCM. In my reading I ran across a 'How It Works' and noticed that the PCM needs to 'learn' again if power is interrupted. Read battery is disconnected. When this happens the PCM apparently loses its marbles and needs retraining or take it for a ride over 35 miles an hour. It worked. Thanks for your time. Hal