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Battery dead or alternator dying?

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHBattery dead or alternator dying?

Leading reported evidence

Check battery

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Suggestion

If you want to check battery, then have somebody measure battery voltage w/ your voltmeter while you start the car.

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Battery dead or alternator dying?
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Leading evidence: 'Check battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check battery' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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1 matching discussions · 3 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Check battery

No successful repair reported for this finding.

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Reported fixes
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Unsuccessful attempts
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Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

If you want to check battery, then have somebody measure battery voltage w/ your voltmeter while you start the car.

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Battery dead or alternator dying?
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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

Hi there and good day to all. Havent driven gt3 for like 4 weeks but noticed when starting up it doesnt crank over first time but after 2 seconds it fires up. Also the voltmeter reads between 12/14 so 13 I guess on the guage and reads 12 with just ignition on. Do u think its the battery or the alternator. Thanks in advance. Mike

POST 2Original post

If you have a voltmeter, the measure voltage at the battery while the car is running. Automotive batteries consist of 6 cells in series, each producing 2.1v for a total of around 12.6v. If your voltmeter reads over 13v (13.5v or greater), then the alternator is good. I think if it reads 15v or greater, then that's bad. If you want to check battery, then have somebody measure battery voltage w/ your voltmeter while you start the car. If voltage drops below 10v, then battery is about dead. ///Michael

POST 3Original post

4 weeks is a long time. you should get a batt. tender. i don't think either batt or alternator is bad

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