Did you install a brand new Nissan alternator or after market rebuilt? It is possible that the alternator you install has gone bad again, especially if it is a rebuilt. To check, get a voltmeter (Harbor Freight have these for about 8 bucks) and check the voltage of the battery (at the terminals with the engine running. It should be near 14 volts DC (ideally 13.8 V).
If it is showing 12 volts with the engine idling, your alternator is not working right.
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Friday, June 25th, 2010 AT 8:33 PM