alternator

2002 MITSUBISHI LANCER
180,000 MILES • 2.4L • 4 CYL • MANUAL
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MANDAW37
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Battery keeps going dead,so I keep having to roll it off and pop the clutch to crank it.How do I know for sure its the alternator?
Oct 22, 2016 at 10:57 PM
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CARADIODOC
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Step one is to measure the battery voltage. With the engine off, it must be 12.6 volts if it is good and fully-charged. If it is around 12.2 volts, it is good but discharged. If it is around 11 volts, it has a shorted cell and must be replaced.

With the engine running, you must find between 13.75 and 14.75 volts. If it is low, it will need to look at a diagram to see what to test before condemning the generator.
Oct 22, 2016 at 11:16 PM