1983 Chevy Van idiot light and fuel gauge.

1983 CHEVROLET VAN
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BUD NILSSON
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Electrical problem
1983 Chevy Van V8 Two Wheel Drive Automatic

Battery voltage good at 12 v.
Start engine batt voltage 12 at idle. Fuel gauge shows 3/ 4 ,wich is about right. Increase rpm and alternator starts charging 13 + v. and the idiot light comes on red "volts" . At the same time the fuel gauge start going towards "full" and stays full . No fuel added . Turn of engine and turn on the key again and no volts light on and without starting the fuel gauge showes normal 3/4 as it is about 3/4 full.
Start up again, at idle ok but no charge (volt) or fuelgauge normal until increasing rpm again to energise the alternator charge and the same tihng again. Idiot light "volts"- fuelgage going to full !
Please advise. Thanks,
You have the answer , I will donate !
Bud
bud@budbrake.com
Sep 9, 2009 at 10:57 PM
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HMAC300
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it sounds like the plug could be loose at teh back of the dash/circuit board. Or the circuit board is bad or the ground wire going to it isi broken or bad... Also there could be a voltage regulator problem/diode bridge problem in teh alternator. Take the alternator to a parts store and have it checked. Also make sure your alternator belt is tight as they loosened up on those models...
Sep 28, 2009 at 11:48 AM
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