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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-27-2005, 09:48 AM   #1
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Default Low voltage

I bought a voltmeter to plug into the lighter because my trusty SSE has no voltmeter. On average, I see mid to low 13 volts. I was suprised it was so low. My Optima yellow top and 105 amp reman alternator are about 3 years old, within 3 months of each other.
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Old 01-27-2005, 10:45 AM   #2
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you do have alot of acc running off that system
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Old 01-27-2005, 11:14 AM   #3
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Everything was on but the wipers, rear defrost, and the AC. My stereo is 1300 watts, but I turned it off and it had little effect. Turned everything else off, gained about .3V.

And does anyone know a real nice plug in voltmeter? I've got this one from Walmart that isn't lit, but has three leds below the display to indicate voltage range. I want one with lit numbers or a needle.
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Old 01-27-2005, 02:51 PM   #4
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JC whitney has plug in ones
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Old 01-27-2005, 03:13 PM   #5
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I found one there. Are there more?
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Old 01-27-2005, 03:43 PM   #6
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i thing Cyberdyne makes a digital plug in one
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Old 01-27-2005, 11:52 PM   #7
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Jeez, I drove in town for half an hour with the voltmeter plugged in. Never saw above 12.6V until I got on the highway to go home. I noticed as low as 10.8V momentarily with turn signal, headlights and rear defrost on. But the car seems to be behaving like it normally does. Do I need to try a new ground for my battery or alternator?
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Old 01-27-2005, 11:54 PM   #8
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Lose the yellowtop. I think it'* had enough time to kill your alternator. It may already be too late for both items.

I'd get a real voltmeter on that to make sure.
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Old 01-28-2005, 02:26 AM   #9
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Do you ever use the battery alone alot? If you're using the full cycle then like Bill sez, you're alt'* gotta fill a huge battery. If you haven't then it'* just it'* time.

After replacing my alt tonight, i think it was hampering most of the car'* systems. It was lower then I thought it was. Trying to re ground it can't hurt though. Just need a lil sandpaper.
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Old 01-28-2005, 09:35 AM   #10
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Pretty much never. I used to use the battery by itself, before this one, then it died. Would it help if I took the alt back to Napa where I got it with a lifetime warranty and swap it for the "with heated windshield" model?
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