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Can anyone explain this electrical problem? 200

posted by  Jessie on  Sat Jul 19 07:12 CST 2003
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last visit: Tue Jan 18 17:45 CST 2011
[RELATED]

I start the car (84 kjet turbo):
the alt light is off, 10 volts on the voltmeter
I rev the engine:
the alt light comes on, 14 volts on the voltmeter
the tach reading is off by about 300 rpm
when I pull up the emergency brake the tach drops to zero and the alt light gets brighter. It stays this way even at idle after revving.
Sound like a ground problem? I have to dig out my voltmeter, but the alternator must be working if I am getting 14 volts on the dash voltmeter. Oh, yes the belts are intact and tight, Newer (used) alternator with brushes replaced about a year ago, engine wiring harness replaced (although it is homemade).
It just does not make any sense, the light and the gauge are saying the opposite.






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