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Author Topic: Low Voltage  (Read 3847 times)

Offline maximus5541

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Low Voltage
« on: September 17, 2008, 04:29:21 pm »
Since i have owned my 83 swb the voltage has always been very low on the gauge. when i roll the windows up or down ( electric windows) it will draw the gauge all the way to low side in the red. and also if i have the a/c on it will draw the gauge all the way in to the red. this hasnt caused any battery failure yet, but i would like to figure something out before it does happen. i have shaved door handles and key locks, so a dead battery is not something that i want to happen. Does anyone have a solution to this or something in mind for me to check out?
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1983 Chevy C10 SWB, 2wd, 350/350
1987 Chevy R20 LWB, 2wd, 305/400
1983 Chevy C10 LWB, 2wd, 305/700r4

Offline ccz145a

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Re: Low Voltage
« Reply #1 on: September 17, 2008, 04:31:57 pm »
Test the battery, fully charge it, then test alternator
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1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
11MPG Downhill w/tailwind (but there ain't no hills here)

Offline VileZambonie

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Re: Low Voltage
« Reply #2 on: September 17, 2008, 07:06:49 pm »
Verify the accuracy of the gauge with a meter. If output is low do a voltage drop test on the alternator and battery. If it checks out ok replace the alternator. The field circuit is integrated.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline blue beast

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Re: Low Voltage
« Reply #3 on: September 17, 2008, 11:38:16 pm »
i used a 95ish alt 97 amp,with a gel cell batt.and also ran 4 gua.amp wire from pos.bat.to pos.bolt on back of the alt .with the stereo blarin 1000 watt amp it stays around 14-15 8).just some ideals hope you figure it out
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chevy tuned up like a nascar pit stop
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