matty1321 Posted January 15, 2011 Share Posted January 15, 2011 Okay guys, I have been having an issue with the battery light . I have a 02 Civic Lx 1.7 SOHC ... I was cruising at 40mph when randomly the battery light came up . As soon as i got back home the first thing i did was remove the alternator and took it to the neighborhood autozone were they tested it and i came up to be fine..... with that i reinstalled it , when i turned the car on everything was back to normal the batt light went off . the next day i took it for a drive and the light came up on again. But what i noticed is that once i pass 3k it turns off and when the rpm drop below 2k it comes back on....??? today i brought out the multimeter and with the car off i checked the batt voltage (12.5v). i turned on the car and the bat voltage remained 12.5v. i connected it to the alt. output and i got 12.5v. Even when i reved past 3k the output was still 12.5v. I connected the probes to the field connector and i am getting the respected readings ( 12.4v,4.8v,5v,0v) Does anyone have any ideas whats going on??? Thanks In advanced!!!! I appreciate all help!!!!! Matt Link to comment Share on other sites More sharing options...
Raley Posted January 15, 2011 Share Posted January 15, 2011 Corroded wires or loose connection, or the belt is slipping would be my guess Link to comment Share on other sites More sharing options...
matty1321 Posted January 17, 2011 Author Share Posted January 17, 2011 It ended up being the alternator... Got a new duralast for $130 with a lifetime warranty. LESSON LEARNED FROM THIS THREAD: Do not always trust your local autozone alternator test. Link to comment Share on other sites More sharing options...
Raley Posted January 17, 2011 Share Posted January 17, 2011 I rarely trust my local autozone with taking back my used oil. Link to comment Share on other sites More sharing options...
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