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73-87 Chevy _ GMC Trucks => Interior & Equipment => Instrumentation => Topic started by: maximus5541 on September 17, 2008, 04:29:21 pm

Title: Low Voltage
Post by: maximus5541 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?

Title: Re: Low Voltage
Post by: ccz145a on September 17, 2008, 04:31:57 pm

Test the battery, fully charge it, then test alternator

Title: Re: Low Voltage
Post by: VileZambonie 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.

Title: Re: Low Voltage
Post by: blue beast 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