how do I know if my alternator or battery needs replaced I can't tell. on 1999 Nissan Maxima

The other day I was driving everything was fine until My brake light and battery light came on in the dash Then as I'm sitting at the light I noticed my car was Running rough Like almost if it wanted to cut off On my way home the car loses power I try to accelerate Nothing happens I coast into quik trip and try to start it Again it won't start everything was dead so I sat and waited With in a few minutes it started back up and then died again It starts up when I jump start it. I need help asap..

by in Potwin, KS on February 09, 2014
1 answer 1 comment
ANSWER by on February 09, 2014
Most likely an alternator/circuit issue, have the systen tested. YOU can check for a blown fuse, if you got the owners manual to find the proper location/function of the fuses!
COMMENT by on February 09, 2014
Measure volts at battery should be around14.0 with car runnings ..

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