I recently got a 2000 Ford excursion (Diesel) And the battery light comes on all of a sudden when the truck is running. It turns off if you give the engine some RPM's but if you let it back to idle then the light will come on. I've worked with 7.3's before, but nothing this computerized before... any suggestions?

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed