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On my 89 Probe it overcharged because I needed a new alternator. Sometimes a bad computer causes "spikes" in the voltage. In this case, turn the headlights on at night, if they flicker like high beams, then the computer is NG. -CE

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โˆ™ 2006-08-03 03:21:26
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Q: Why does the voltage regulator in a 1989 Ford Probe overcharge?
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