Question about Mitsubishi Diamante

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1993 mits. diamante. The battery was 6 months old and the alternator is brand new. The vehicle just died while i was driving it down the road. The wires were checked with a voltameter and are good. We jumped it and the vehicle started for a minute and died again. Could the new alternator be bad or the battery?

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The easiest thing to do is to check the generator. If you have a voltmeter, check the voltage across the battery terminals while the car is running. You should get a reading of approximately 14.9 volts which means the gererator is working. With the engine off, check the battery voltage, it should be 12 volts. if it reads less (say 9 or 10 volts), the battery is not holding the charge and needs to be replaced. Also make sure you have good CLEAN TIGHT connections between the battery terminals and the leads. Sometimes a loose connection or oxidation between the terminals and the connector causing a poor connection is to blame.

Posted on Aug 11, 2008

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Nicole; check the alternator belt, loose,worn, is it still there and on.
If battery is new and connections are good, and belt is good, probably a bad alternator. Alternator cost $125 to $200, labor $60-$120
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