Voltage way too high????? - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

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post #1 of 7 (permalink) Old Jan 23rd, 03, 02:02 PM Thread Starter
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Location: Bowmanville, ON Canada
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I'm at my wits end.
I have a '69 that I've added a guage pod to. One of the guages is a voltmeter.
Up to now, I've never known what volts I was running, so now when I turn the key on, the volts read 12, but when it starts, they jump right up to anywhere between 14-16. (Is this normal??)
I've replaced the battery, voltage regulator, and am going to replace the alternator next week.
Will this fix the problem or what?
I've already chased down all my grounds (I think) and they're fine.
I need a solution.
All replies are greatly apprecated! Please reply to me at [email protected]
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post #2 of 7 (permalink) Old Jan 23rd, 03, 06:35 PM
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my Nova runs a steady 14.6 volts when running, and something like 12.4 or so off the battery with the key off.

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355sb, vortec heads, HOT cam,T-10 tranny, 3.70 gears 16X8" IROC wheels. 12" Corvette brakes on the way.
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post #3 of 7 (permalink) Old Jan 23rd, 03, 08:20 PM
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That seems fine to me. I ran a powermaster and got about the same voltage as you without any problems
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post #4 of 7 (permalink) Old Jan 24th, 03, 05:33 AM
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The voltage required to recharge a lead acid is 20% more than usage.

Hence, 12 volts needs 12 + 20% = 14.4 volts.

As others stated, your doing fine. Should never charge over 15 volts, then there is a problem, or under 13.6 volts.

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post #5 of 7 (permalink) Old Jan 24th, 03, 05:42 AM
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The new voltmeter may read a little high. Have you checked with another meter ?
I wouldnt worry about 16v anyway.

My 68 Camaro
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post #6 of 7 (permalink) Old Jan 24th, 03, 07:19 AM
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16 volts is OK for a quick charger but too high for the car alternator. Idea is to replenish the battery after starting the car. Alternators are not battery chargers. Applying a constant 16 volts on it begins to overcharge the battery. Battery will start losing its electrolyte (acid on the battery tray) and its life will be shortened.
Agree check the system with a good hand held meter and see if the car's voltmeter is accurate.
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post #7 of 7 (permalink) Old Jan 24th, 03, 01:09 PM
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If a battery every gets to 16 volts or above, it usually means it is 'sulfated'. That can happen if the water level ever gets too low.

However, if the regulator is working properly, the voltage regulator should limit the voltage to 14.4 as others have stated.

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