Battery charged, cables new but voltmeter reads 8 volts & no start - Team Camaro Tech
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post #1 of 14 (permalink) Old Aug 11th, 08, 07:08 PM Thread Starter
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Battery charged, cables new but voltmeter reads 8 volts & no start

Here is my issue.

The car started fine last week.

I went to start it tonight and the starter just goes "click, click, click, click, click". The voltmeter reads 8 volts so it would seem that it was simply a dead battery...I checked the battery and it has a full 14 volts. Cables on the battery end are shiny clean.

What could be my problem here?

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post #2 of 14 (permalink) Old Aug 11th, 08, 07:28 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Bad connection on the starter?

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post #3 of 14 (permalink) Old Aug 11th, 08, 07:51 PM Thread Starter
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

It is curious that the battery is at 14v but the voltmeter reads 8v....what could it be...?

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post #4 of 14 (permalink) Old Aug 11th, 08, 08:00 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Still sounds like a loose connection be it at the starter or at the horn relay.

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post #5 of 14 (permalink) Old Aug 11th, 08, 09:35 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

When I see those I go back to the basics. Clean battery cables at battery, pull the bolts out if it's side post. Clean comnections at starter and ground connection at block. Clean positive at horn relay and ground at fender. Inspect anything else that might remotely be suspect like fusable links etc. Another long shot is the connnections between the firewall connector. I've only been there a few times and I think mostly one brand/mode; of car. (not camaro)

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post #6 of 14 (permalink) Old Aug 11th, 08, 09:36 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Ya check the voltage at the horn relay, put a load on it too and check. Could be something silly like the wires came loose on the junction block behind the battery.





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post #7 of 14 (permalink) Old Aug 11th, 08, 10:19 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Quote:
Originally Posted by Brentmc View Post
It is curious that the battery is at 14v but the voltmeter reads 8v....what could it be...?
It is reading a big voltage drop. Bad connections.

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post #8 of 14 (permalink) Old Aug 12th, 08, 05:37 AM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Disregard.... I guess I should read the titles a little more carefully.

Maybe a rotted negative cable. I have seen them corrode between the battery and the engine and have the ends look fine. Feel along the neg. cable for a hot spot after trying to start the car.

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post #9 of 14 (permalink) Old Aug 12th, 08, 10:12 AM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

I'm betting you have a poor ground make sure your ground is at a non painted surface with no corrosion

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post #10 of 14 (permalink) Old Aug 12th, 08, 10:46 AM Thread Starter
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Thanks all.

The big question was why the battery was fully charged at 14v but the voltmeter gauge reads 8 vlts. I will remove and clean both cables at both ends and retry tonight...

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post #11 of 14 (permalink) Old Aug 12th, 08, 10:51 AM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Another thing Brent, after a week of sitting without a draw, your fully charged battery should read about 12.6 volts, not 14.
Oh, another thing, 8 volts doesn't seem to be enough power to make a starter click. Hmmmm,,,,

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post #12 of 14 (permalink) Old Aug 12th, 08, 11:02 AM Thread Starter
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Fred,

Great catch. I think I was measuring the voltage after hooking it directly to the battery charger and then unsucessfully trying to start it...

Obviously not a good time to measure it...I checked it later and it had 12.6-ish volts...

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post #13 of 14 (permalink) Old Aug 12th, 08, 02:20 PM
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

I see no mention of how old the battery is. The last one I changed would lose enough charge to give the symptoms you have in a couple of days. A new battery and problem was solved. I was chasing mystery drains etc. Batteries just get tired after a few years. Especially if they don't get regular charging.

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post #14 of 14 (permalink) Old Aug 12th, 08, 07:39 PM Thread Starter
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Re: Battery charged, cables new but voltmeter reads 8 volts & no start

Follow-up:

Two things were wrong. Ground cable was dirty and battery was dead. Car couldn't be jump started because of ground. Once we cleaned the ground, measured the battery voltage (6.8 volts), charged the battery, it started right up.

Thanks guys for the guidance. Another problem solved.

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